Tomb of Countless Riches

When Tomb of Countless Riches enters the battlefield, sacrifice it unless it was discovered.
When Tomb of Countless Riches enters the battlefield and at the beginning of your upkeep,
create a Treasure token, then create a Treasure
token for each Treasure you control.
Discover—{5}, Tap four untapped creatures you control. (If it's your precombat main phase, you may
cast this card for its discover cost)