Chance for Change

Whenever you cast your first spell during each
turn, flip a coin. If you win the flip, draw a card.
Whenever you cast your second spell during each
turn, flip a coin. If you win the flip, add
{1}{u}{r} to your mana pool.
Whenever you cast your third spell during each
turn, flip a coin. If you win the flip, create a copy
of the third spell that was cast this turn.