Splat Zone

Colorful ink.
Cumulative upkeep {1}. Only pay for this with
mana of Splat Zone's color.
During your upkeep, if Splat Zone has five or
more age counters on it, you win the game.
{4}: Remove an age counter from Splat Zone.
Only pay for this with mana of a color other than
Splat Zone's. Any player may activate this ability.