First printed in Urza's Legacy (1999)
Intervene 
Instant
Counter target spell that targets a creature.
"At first I simply observed. But I found that without investment in others, life serves no purpose."
—Karn, silver golem
- Illustrated by
- Heather Hudson
Legality
- Legal in
- Legacy, Vintage, Pauper, Premodern, Commander, Duel Commander, Pauper Commander, PreDH, Tiny Leaders, Oathbreaker
- Not legal in
- Standard, Pioneer, Modern, Future Standard, Historic, Timeless, Alchemy, Penny Dreadful, Old School 93/94, Gladiator, Brawl, Standard Brawl, Competitive Brawl
Rulings (4)
- If the spell’s target leaves the battlefield before this spell resolves, Intervene won’t resolve since it no longer targets a spell that targets a creature.
- If a spell is modal, use the target(s) of the current mode only for this check. Targets for the other modes are never selected.
- It means “targeting at least one creature” not “exactly one creature”.
- Intervene can only target a spell that is currently targeting a creature.
Prices
MTGO price: 0.009 TIX, the cheapest non-foil print (average sell price on GoatBots, 29 Oct 2026).
