Magmablood Archaic (SOS 123)

Creature — Avatar • Mana cost: {2/R}{2/R}{2/R} • Secrets of Strixhaven • Rare

Trample, reach
Converge — This creature enters with a +1/+1 counter on it for each color of mana spent to cast it.
Whenever you cast an instant or sorcery spell, creatures you control get +1/+0 until end of turn for each color of mana spent to cast that spell.

Illustrated by Joshua Raphael.