Priscilla, Young Psychomancer

If Priscilla, Young Psychomancer is in your
opening hand or in the command zone, you
may begin the game with it on the battlefield.
Flying, trample, haste
Whenever you would draw a card, instead put a
+1/+1 counter on a creature you control, then
add one mana of any colour. You don't lose
unspent mana as steps and phases end.