Titania's Chosen

Trample

Whenever a player casts a spell, put a +1/+1 counter on this creature.

Whenever you cast a noncreature spell, put a +1/+1 counter on this creature.

Whenever an opponent casts an artifact spell, put a +1/+1 counter on this creature.

Heroic — Whenever you cast a spell that targets this creature, put two +1/+1 counters 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 another Elf enters, put a +1/+1 counter on this creature.