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
2026-03-20
Aberrant Manawurm's last ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered or otherwise leaves the stack.