Turgon, Rider of Terrax

Eminence — Whenever you attack with one or more Knights, if Turgon, Rider of Terrax is
in the command zone or on the battlefield,
draw a card, then discard a card.
Flying, first strike
Whenever Turgon, Rider of Terrax deals
combat damage to a player, return target
Knight creature card from your graveyard
to the battlefield.