Galactus, Devourer of Worlds

Reach

At the beginning of your upkeep, Galactus,
Devourer of Worlds gets a -1/-1 counter.
{t}, Sacrifice a land: Remove all -1/-1
counters from Galactus, Devourer of Worlds.
Gain X life, where X is the number of -1/-1
counters that were removed.