Pomni, Digital Jester

Pomni, Digital Jester enters the battlefield with
13 sanity counters. Whenever you flip a coin
remove a sanity counter from Pomni. Then if
Pomni has no sanity counters transform her.
whenever you cast a spell you flip a coin. If you
lose Pomni deals 3 damage to you. If you win
flip another coin. If you win cascade. If you lose
shuffle it into your library. Then reveal the top
card of your library. You may play it without
paying it's mana cost.