Merman Card
Worn on Shoes Sells for 10Z
What it grants
+20% HP regen+20% SP regen
Upgraded copies
Normal cards target 2× their original scalable bonuses, ★★ 4×, and ★★★ 8×. Each rank doubles the previous rank. Existing penalties and binary effects stay unchanged, and equipment stacking limits still apply.
Normal
+20% HP regen+20% SP regen
★★
+40% HP regen+40% SP regen
★★★
+80% HP regen+80% SP regen
★★ can be found from Hard upwards or made through Card Master Fusion. ★★★ never drops; Fusion is its source. Hunting far below your own level does not turn up upgraded cards.