Voidslime 
Instant
"It is technically an ooze, but its lifespan measures only seconds. In that short time, its appetite for magic is extraordinary."—Simic research notes
Artist:
Jim MurrayShare:
Text:
Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)
Rulings:
- 6/8/2016 Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities and will have colons in their reminder text.
Legality:
- standard: Not legal
- future: Not legal
- frontier: Not legal
- modern: Legal
- legacy: Legal
- pauper: Not legal
- vintage: Legal
- penny: Not legal
- commander: Legal
- duel: Legal
- oldschool: Not legal
