back of an mtg card Classic Standard Deck Protector Sleeves (100ct) for Magic: The Gathering The Lord of the Rings Brought Back · Core Set

When The Warring Triad enters the battlefield, the number of cards in your graveyard will determine if a creature entered the battlefield or not for abilities that trigger whenever a creature enters the battlefield

The reason that the card costs so much is that it is pretty much the number one most iconic creature from Magic during that time, with Serra Angel an easy choice for second place

Its not the most reliable source of consistent looting, but having zombie synergies is a nice touch

Other Somewhat Popular Sideboard Options Kitchen Finks is a main-deck card in some builds but is also used from sideboards to fight aggro by gaining some life and blocking twice