Vast Frozen Sea of Lamord

{t}: Add {u} to your mana pool.
Vast Frozen Sea of Lamord enters the battlefield tapped with X frozen counters on it, where X is
equal to the sum of all cards in all player's hands.
Whenever a player casts a spell, you may remove
a frozen counter from Vast Frozen Sea of
Lamord, then if there is no frozen counters on it,
transform it.