You can cast them more efficiently than other spells of its type, and get to the ability that comes with it faster
Wham Bam Punch has no ceiling for damage, making it one of the most dangerous attacks in the game, though, with only 30 bonus damage per successful coinflip, it is a gamble that may not pay off
[G][C] Pin Missile: 40x damage
Note that this is the only floor to have a Pokmon for you to acquire - the very rare Lapras, which comes with 'gift' Pokmon high stats and is only obtainable via Catch Combo on a much later route, so this one's very much worth getting
The +1 ability can effectively neutralize a 2/3, but if you turn it into a removal spell, suddenly Liliana is mowing down an entire battlefield of creatures, all the while building toward a nigh-unbeatable ultimate