Terraturtle

Trample
Whenever Terraturtle leaves your graveyard
search your library for a basic land card, put that
card onto the battlefield tapped, then shuffle.
Seal 5 - {1}{g}(Exile this card from your graveyard
with five time counters on it. At the beginning of your upkeep, remove a time counter. When the last is
removed, cast it without paying its mana cost.)