Krydle of Baldur's Gate 
Legendary Creature — Human Elf Rogue
Whenever Krydle deals combat damage to a player, that player loses 1 life and mills a card, then you gain 1 life and scry 1.
Whenever you attack, you may pay 
. If you do, target creature can't be blocked this turn.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL