Finn is a Hero Card in Card Wars. It can be obtained as reward in Quest 3.
(5 Turns) Gain 2 extra Magic Points for 1 turn.
Since Finn gets 2 extra magic, his ability can be used to get a high magic cost card out and use its floop in 1 turn, possibly making an attack opening to 1-hit K.O. your opponent! Do not use Finn if you have BMO because has the same ability but takes fewer turns to use.