Cinderheart, Nation's End

This spell can't be countered.
Flying, haste
{r}: Cinderheart, Nation's End gets +1/+0 until end of turn. When its power reaches 20 this way, it deals 20 damage to any target.

"At his command, lands burn,
With his word, armies perish;
For him, are towns razed,
On a whim, nations die."