Kuvos' Sealed Chamber

Kuvos' Sealed Chamber enters play with five
seal counters on it.
In each end step, if you investigated this turn,
remove a seal counter from Kuvos' Sealed
Chamber. Then, if it has no seal counters on it,
sacrifice it and search your library for a legendary
card and a land card, reveal those cards and put
them into your hand, then shuffle.