Dicey Dandelos

{2}{b}{r}, Pay 2 life: Choose Gamble or Rebuild. Roll a D6. If Gamble was chosen, reveal cards from the top of your library equal to the result. Put all creatures revealed onto the battlefield without paying their mana cost.
You lose 3 life for all other cards revealed. Exile revealed cards not put on the battlefield. If Safety was chosen, gain life and
create 1/3 Colorless Wall Creature Tokens
with Reach, Defender, and Lifelink equal to
the result.