The Watery End

This spell cant be countered and The Watery End
has hexproof as long as The Watery End has
more than 10 counters. X is equal to the amount
of players playing.
When The Watery End enters the battle field
all lands turn to islands and put
20 counters on The Watery End.
During each players end step all
players sacrifice one land, one non-land
permanent and removes a counter from
The Watery End.