Glaer's Dungeon

{t}: Target attacking creature does not untap during its untap phase As long as Glaer's dungeon is tapped, so is that creature.
Each turn a creature remains tapped in this way, it receives a madness token.
When the creature has acquired 3 madness tokens, bury it.
{t}: Sacrifice Glaer's Dungeon. Search your library or any other library for Chakan, The Forever Man and put him into play as if he were just summoned.