Whenever you cast a noncreature spell, put a +1/+1 counter on this creature.
Illustrated by Alex Konstad · Ixalan Promos · #185
2017-09-29Deeproot Champion’s ability resolves before the spell that caused it to trigger.
Whenever a player casts a Giant spell, you may put a +1/+1 counter on this creature.
Whenever you cast a spell that's white, blue, black, or red, put a +1/+1 counter on this creature.
Whenever you cast a creature spell that has an Adventure, put a +1/+1 counter on this creature. (It doesn't need to have gone on the adventure first.)
Whenever a player casts a green spell, put a +1/+1 counter on this creature.
Trample
Whenever a player casts a spell, put a +1/+1 counter on this creature.