diff --git a/scripts/crop-all-sheets.sh b/scripts/crop-all-sheets.sh
new file mode 100755
index 0000000..bfadce1
--- /dev/null
+++ b/scripts/crop-all-sheets.sh
@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cd "$(dirname "$0")/.."
+
+CROP="scripts/crop-sheet.sh"
+CARD_W=744
+CARD_H=1039
+SMALL_W=525
+SMALL_H=750
+
+total=0
+
+run_crop() {
+ local label="$1"
+ local src="$2"
+ local outdir="$3"
+ local w="$4"
+ local h="$5"
+
+ [[ -f "$src" ]] || { echo "SKIP: $src not found"; return; }
+
+ mkdir -p "$outdir"
+ count=$("$CROP" "$src" "$w" "$h" "$outdir")
+ echo "$label: $count"
+ total=$(( total + count ))
+}
+
+# card size sheets
+run_crop "Cards_Ironclad" StS_BG_assets/Cards_Ironclad.png assets/images/board_game/cards/ironclad $CARD_W $CARD_H
+run_crop "Cards_Ironclad_Upgrade" StS_BG_assets/Cards_Ironclad_Upgrade.png assets/images/board_game/cards/ironclad_upgraded $CARD_W $CARD_H
+run_crop "Cards_Ironclad_Rare" StS_BG_assets/Cards_Ironclad_Rare.png assets/images/board_game/cards/ironclad_rare $CARD_W $CARD_H
+run_crop "Cards_Ironclad_Rare_Upgraded" StS_BG_assets/Cards_Ironclad_Rare_Upgraded.png assets/images/board_game/cards/ironclad_rare_upgraded $CARD_W $CARD_H
+run_crop "Cards_Ironclad_Start" StS_BG_assets/Cards_Ironclad_Start.png assets/images/board_game/cards/ironclad_starter $CARD_W $CARD_H
+run_crop "Cards_Ironclad_Start_Upgraded" StS_BG_assets/Cards_Ironclad_Start_Upgraded.png assets/images/board_game/cards/ironclad_starter_upgraded $CARD_W $CARD_H
+run_crop "Cards_Silent" StS_BG_assets/Cards_Silent.png assets/images/board_game/cards/silent $CARD_W $CARD_H
+run_crop "Cards_Silent_Upgraded" StS_BG_assets/Cards_Silent_Upgraded.png assets/images/board_game/cards/silent_upgraded $CARD_W $CARD_H
+run_crop "Cards_Silent_Rare" StS_BG_assets/Cards_Silent_Rare.png assets/images/board_game/cards/silent_rare $CARD_W $CARD_H
+run_crop "Cards_Silent_Rare_Upgraded" StS_BG_assets/Cards_Silent_Rare_Upgraded.png assets/images/board_game/cards/silent_rare_upgraded $CARD_W $CARD_H
+run_crop "Cards_Silent_Start" StS_BG_assets/Cards_Silent_Start.png assets/images/board_game/cards/silent_starter $CARD_W $CARD_H
+run_crop "Cards_Silent_Start_Upgraded" StS_BG_assets/Cards_Silent_Start_Upgraded.png assets/images/board_game/cards/silent_starter_upgraded $CARD_W $CARD_H
+run_crop "Cards_Defect" StS_BG_assets/Cards_Defect.png assets/images/board_game/cards/defect $CARD_W $CARD_H
+run_crop "Cards_Defect_Upgraded" StS_BG_assets/Cards_Defect_Upgraded.png assets/images/board_game/cards/defect_upgraded $CARD_W $CARD_H
+run_crop "Cards_Defect_Rare" StS_BG_assets/Cards_Defect_Rare.png assets/images/board_game/cards/defect_rare $CARD_W $CARD_H
+run_crop "Cards_Defect_Rare_Upgraded" StS_BG_assets/Cards_Defect_Rare_Upgraded.png assets/images/board_game/cards/defect_rare_upgraded $CARD_W $CARD_H
+run_crop "Cards_Defect_Start" StS_BG_assets/Cards_Defect_Start.png assets/images/board_game/cards/defect_starter $CARD_W $CARD_H
+run_crop "Cards_Defect_Start_Upgraded" StS_BG_assets/Cards_Defect_Start_Upgraded.png assets/images/board_game/cards/defect_starter_upgraded $CARD_W $CARD_H
+run_crop "Cards_Watcher" StS_BG_assets/Cards_Watcher.png assets/images/board_game/cards/watcher $CARD_W $CARD_H
+run_crop "Cards_Watcher_Upgraded" StS_BG_assets/Cards_Watcher_Upgraded.png assets/images/board_game/cards/watcher_upgraded $CARD_W $CARD_H
+run_crop "Cards_Watcher_Rare" StS_BG_assets/Cards_Watcher_Rare.png assets/images/board_game/cards/watcher_rare $CARD_W $CARD_H
+run_crop "Cards_Watcher_Rare_Upgraded" StS_BG_assets/Cards_Watcher_Rare_Upgraded.png assets/images/board_game/cards/watcher_rare_upgraded $CARD_W $CARD_H
+run_crop "Cards_Watcher_Start" StS_BG_assets/Cards_Watcher_Start.png assets/images/board_game/cards/watcher_starter $CARD_W $CARD_H
+run_crop "Cards_Watcher_Start_Upgraded" StS_BG_assets/Cards_Watcher_Start_Upgraded.png assets/images/board_game/cards/watcher_starter_upgraded $CARD_W $CARD_H
+run_crop "Cards_Colorless" StS_BG_assets/Cards_Colorless.png assets/images/board_game/cards/colorless $CARD_W $CARD_H
+run_crop "Cards_Colorless_Upgraded" StS_BG_assets/Cards_Colorless_Upgraded.png assets/images/board_game/cards/colorless_upgraded $CARD_W $CARD_H
+run_crop "Curse" StS_BG_assets/Curse.png assets/images/board_game/cards/curses $CARD_W $CARD_H
+run_crop "Curse_A5" StS_BG_assets/Curse_A5.png assets/images/board_game/cards/curses_a5 $CARD_W $CARD_H
+run_crop "Enemies_Act1" StS_BG_assets/Enemies_Act1.png assets/images/board_game/enemies/act1 $CARD_W $CARD_H
+run_crop "Enemies_Act2" StS_BG_assets/Enemies_Act2.png assets/images/board_game/enemies/act2 $CARD_W $CARD_H
+run_crop "Enemies_Act3" StS_BG_assets/Enemies_Act3.png assets/images/board_game/enemies/act3 $CARD_W $CARD_H
+run_crop "Elites_Act1" StS_BG_assets/Elites_Act1.png assets/images/board_game/elites/act1 $CARD_W $CARD_H
+run_crop "Elites_Act2" StS_BG_assets/Elites_Act2.png assets/images/board_game/elites/act2 $CARD_W $CARD_H
+run_crop "Elites_Act3" StS_BG_assets/Elites_Act3.png assets/images/board_game/elites/act3 $CARD_W $CARD_H
+run_crop "Summons_Act1" StS_BG_assets/Summons_Act1.png assets/images/board_game/summons/act1 $CARD_W $CARD_H
+run_crop "Summons_Act2" StS_BG_assets/Summons_Act2.png assets/images/board_game/summons/act2 $CARD_W $CARD_H
+run_crop "Summons_Act3" StS_BG_assets/Summons_Act3.png assets/images/board_game/summons/act3 $CARD_W $CARD_H
+run_crop "Events" StS_BG_assets/Events.png assets/images/board_game/events/general $CARD_W $CARD_H
+run_crop "Events_Act1" StS_BG_assets/Events_Act1.png assets/images/board_game/events/act1 $CARD_W $CARD_H
+run_crop "Events_Act2" StS_BG_assets/Events_Act2.png assets/images/board_game/events/act2 $CARD_W $CARD_H
+run_crop "Events_Act3" StS_BG_assets/Events_Act3.png assets/images/board_game/events/act3 $CARD_W $CARD_H
+run_crop "Neows_Blessing" StS_BG_assets/Neows_Blessing.png assets/images/board_game/events/neows_blessing $CARD_W $CARD_H
+
+# small size sheets
+run_crop "Relics_Common" StS_BG_assets/Relics_Common.png assets/images/board_game/relics/common $SMALL_W $SMALL_H
+run_crop "Relics_Boss" StS_BG_assets/Relics_Boss.png assets/images/board_game/relics/boss $SMALL_W $SMALL_H
+run_crop "Potions" StS_BG_assets/Potions.png assets/images/board_game/potions $SMALL_W $SMALL_H
+
+echo "total: $total"
diff --git a/scripts/crop-sheet.sh b/scripts/crop-sheet.sh
new file mode 100755
index 0000000..862b870
--- /dev/null
+++ b/scripts/crop-sheet.sh
@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ $# -ne 4 ]]; then
+ echo "usage: crop-sheet.sh "
+ exit 1
+fi
+
+input="$1"
+width="$2"
+height="$3"
+outdir="$4"
+
+mkdir -p "$outdir"
+rm -f "${outdir}"/*.png
+
+magick "$input" -crop "${width}x${height}" +repage "${outdir}/%03d.png"
+
+count=0
+for file in "${outdir}"/*.png; do
+ [[ -f "$file" ]] || continue
+ dims=$(magick "$file" -format "%wx%h" info:)
+ if [[ "$dims" != "${width}x${height}" ]]; then
+ rm "$file"
+ continue
+ fi
+ mean=$(magick "$file" -format "%[mean]" info:)
+ if [[ "$mean" == "0" ]]; then
+ rm "$file"
+ else
+ (( ++count ))
+ fi
+done
+
+echo "$count"