You get a couple of 2/2 green Cat tokens when it enters, plus you make a copy of any token you want whenever you crew and attack with the Chariot
6: Exile the top seven cards of your library
However, weirdly enough, its also sometimes the best card against soft graveyard hate like Relic of Progenitus and Soul-Guide Lantern, as you can quickly rebuild a graveyard to fuel a Murktide Regent if your opponent has exiled your graveyard earlier in the game
If your deck does not have access to green, you might have to get more creative by using cards like Tithe, Pilgrims Eye, or even Demonic Tutor to put lands into your hand, cards like Mana Geyser, High Tide, or Caged Sun to get a big payoff, or mana rocks like Arcane Signet, Coalition Relic, and the Ravnica Signet cycle (Boros Signet, Izzet Signet, etc.) to speed things along at the risk of seeing them destroyed later