Tidal Cradle enters the battlefield tapped unless you control one or more monocolored permanents.
: Add or to your mana pool.
Put Tidal Cradle on top of your library: Add to your mana pool.
: Regenerate Tidal Cradle.
: Add 
or 
to your mana pool.
to your mana pool. : Regenerate Tidal Cradle.
