Krydle of Baldur's Gate (Adventures in the Forgotten Realms)

Legendary Creature Ñ 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 {2}. If you do, target creature can't be blocked this turn.