Hedron's Light

Exile target creature. Its controller gains 4 life.
Overextend {1}{w}{w} (At the beginning of your next upkeep, pay {1}{w}{w}. If you can't, tap all lands with
mana abilities you control and lose all unspent mana.)
Zendikari researchers found that re-aligning the
remaining hedrons opened doors to many strange new possibilities.