King Bumi, Mad Genius

{1}{u}{r}: Deal 5 damage to target creature.
Activate once per turn.
{4}{u}{u}{r}{r}: Flip five coins. For each
coin that lands on heads, you take an extra turn.
For each coin that lands on tails, you lose 4 life.
"You have much to learn. You must master the 4
elements and confront the fire lord. And when you
do, I hope you will think like a mad genius."
- King Bumi, Mad Genius