Time Vault [Beta Edition] XY101 Set: Ixalan Prerelease Promos Type:

Set: Ixalan Prerelease Promos Type: Creature — Dinosaur Rarity: Rare Cost: {2}{W} Flying

and that player sacrifices those creatures

Sunken Hollow enters the battlefield tapped unless you control two or more basic lands

Phyrexian Broodstar's power and toughness are each equal to the number of Phyrexians you control

Time Vault [Beta Edition] XY101 Set: Ixalan Prerelease Promos Type:Set: Beta Edition Type: Artifact Rarity: Rare Cost: {2} Time Vault enters the battlefield tapped. Time Vault doesn't untap during your untap step. If you would begin your turn while Time Vault is tapped, you may skip that turn instead. If you do, untap Time Vault. {T}: Take an extra turn after this one.