Eris Dreadcaster

Haste, Undying
Whenever you would roll a d20 while Eris Dreadcaster is on the battlefield then use the results of the die for the following effects:
1-6| Deal 5 damage to each creature, then sacrifice Eris Dreadcaster
7-13| Create a 0/1 Green Earth Elemental
14-19| Each creature you control gains +3/+1 or Trample until end of turn.
20| Untap Eris Dreadcaster, until end of turn the next time you tap Eris Dreadcaster roll 3 d20
{t}Roll a d20