mtg cards like gravecrawler [Secret Lair Drop Series] – TokenMTG Gravecrawler cant block.You may cast Gravecrawler from your graveyard as long as you control a Zombie. Gravecrawler | Pitiless Plunderer |

Because there isn't much about "card advantage" on the card at all

Sounds better than it is in practice though, since exile removal breaks up the loop, and the creature can be perma-killed a second time before the aura re-attaches

There have even been entire sets with zombies as a central theme, like most Innistrad sets or Amonkhet and Hour of Devastation

The most clear example is a Judgment enchantment, Soulcatchers' Aerie, which mass-pumps your Birds whenever somebody of your flock's die, and which soared by over 500% almost overnight, rocketing from near-bulk to over $6: Source: MTGStocks This 2-mana enchantment in a deck that wants you to full swing every turn is just gas for bird typal decks