Mana Shaft

Hexproof
This card enters the battlefield with two counters
on it for each color of mana spent to cast it. At
the beginning of your upkeep, remove a counter
from it. When the last is removed, sacrifice it.
Target player removes all but two lands in play,
their hand, and may not play lands. Whenever
a land is drawn, that player must reveal it and
then exile it.