Enchanted Bog

: this land enters the battlefield tapped and put 2 poison counters on a player. tap: add one mana of any color if that color is black, tap a land.
+2: create a emblem with "sacrifice a creature: put a +1/+1 counter on all creatures you control. then, each opponent sacrifices 2 creatures".
-8: destroy 4 target permanants, then draw 8 cards. each opponent exiles the top 8 cards of their decks. create tokens that are copys of those.