Sentinel of Lost Lore 
Creature — Elf Knight
When this creature enters, choose one or more — • Return target card you own in exile that has an Adventure to your hand. • Put target card you don't own in exile that has an Adventure on the bottom of its owner's library. • Exile target player's graveyard.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL