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Legality
| Format | Legality |
| 1v1 Commander | Legal |
| Alchemy | Legal |
| Arena | Legal |
| Block Constructed | Legal |
| Canadian Highlander | Legal |
| Casual | Legal |
| Commander / EDH | Legal |
| Commander: Rule 0 | Legal |
| Custom | Legal |
| Duel Commander | Legal |
| Gladiator | Legal |
| Highlander | Legal |
| Historic | Legal |
| Historic Brawl | Legal |
| Legacy | Legal |
| Leviathan | Legal |
| Limited | Legal |
| Modern | Legal |
| Oathbreaker | Legal |
| Pioneer | Legal |
| Pre-release | Legal |
| Standard | Legal |
| Standard Brawl | Legal |
| Tiny Leaders | Legal |
| Vintage | Legal |
Assimilation Aegis
Artifact — Equipment
When Assimilation Aegis enters the battlefield, exile up to one target creature until Assimilation Aegis leaves the battlefield.
When Assimilation Aegis becomes attached to a creature, for as long as Assimilation Aegis remains attached to it, that creature becomes a copy of a creature card exiled with Assimilation Aegis.
Equip (: Attach this to target creature you control. Equip only as a sorcery. This enters the battlefield unattached and stays on the battlefield if the creature this card is attached to leaves the battlefield.)
