Since the Spring update came out and we now can get spellements from cantrip chests and Wooden Chests, I figured I'd share what I've discovered about...
Cast Cantrips whose ranks equal your Cantrip rank. At rank 1, all the spells you can learn will give XP. At rank 2, none of those will work anymore,...
There are a few that can AoE by turn 3, a lot of which need to level up a couple times to even get those cards (such as Fire Mino, Fire Pig, Balance...