Ariel, the Timesinger

Your maximum hand size is 13 while Ariel the Vulerin is your Commander, or in the battlefield.
• At the beginning of your upkeep step, draw cards until your hand size equals a number in the fibonacci sequence.
• At the end of your end step, discard cards until the number of cards in your hand is prime.
• If at the end of your turn your hand size is 13, the player takes 13 damage that can only be blocked by a planeswalker, then flip this card to "Ariel, Number 13".

"One wrong note a