Menace
Opus — Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature. If five or more mana was spent to cast that spell, add an amount of {R} equal to this creature's power.
Mana cost
1
R
Mana value
2
Printings
From
$0.61
EDHREC rank
#8006
Buy
Formats
Standard
Legal
Pioneer
Legal
Modern
Legal
Legacy
Legal
Vintage
Legal
Commander
Legal
Rulings
20 Mar 2026
Molten-Core Maestro's last ability is not a mana ability. It uses the stack and can be responded to.
20 Mar 2026
An opus ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered or otherwise leaves the stack.