Aberrant Manawurm (#138)

Type: Creature — Wurm

Text: Trample
Whenever you cast an instant or sorcery spell, this creature gets +X/+0 until end of turn, where X is the amount of mana spent to cast that spell.

"What is the equation for terror?" —Lost research note, Paradox Gardens

Set: Secrets of Strixhaven (#138)