Altar of the Brood 
Artifact
Supplicants offer flesh and silver, flowers and blood. The altar takes what it will, eyes gleaming with unspoken promises.
Artist:
Erica YangShare:
Text:
Whenever another permanent enters the battlefield under your control, each opponent mills a card.
Rulings:
- 9/20/2014 If Altar of the Brood enters the battlefield under your control at the same time as other permanents, its ability will trigger for each of those permanents.
Legality:
- standard: Not legal
- future: Not legal
- frontier: Legal
- modern: Legal
- legacy: Legal
- pauper: Not legal
- vintage: Legal
- penny: Legal
- commander: Legal
- 1v1: Legal
- duel: Legal
- brawl: Not legal
- oldschool: Not legal
- historic: Not legal
- pioneer: Legal
- gladiator: Not legal
- premodern: Not legal
- historicbrawl: Not legal
- paupercommander: Not legal
- alchemy: Not legal
- explorer: Not legal
- predh: Not legal
- oathbreaker: Legal
Sets:
-
Magic Online Promos #55787 (rare)
-
Ugin's Fate #216 (rare)
-
Khans of Tarkir #216 (rare)