Great Flood

Great Flood enters the battlefield tapped.
{u}: For each player you choose from among the permanents that player controls an artifact, a creature, an enchantment, and a Planeswalker.
Put a protection counter on each of the chosen permanents. You may untap Great Flood.
{w},{t}, sacrifice Great Flood:
Each player sacrifices all nonland permanents
they control, that have no protection counter.