Kiln Fiend

Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn.

Trample

Whenever you cast an instant or sorcery spell, this creature gets +1/+0 until end of turn.

Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn.

Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn. Untap it.

Flying

Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn.

Flying

Whenever you cast an instant, sorcery, or Wizard spell, this creature gets +2/+0 until end of turn.