Naktamun, City of Gods

This land enters the battlefield tapped unless you control at least three different colored permanents.
{t}: add {r}, {w}, or {u}
Whenever you cast a creature spell, if it had a keyword, each of your creatures gain that keyword
until that creature leaves the battlefield.
Whenever you cast a creature spell with greater
power than other creatures, put +1+1 counters on
those creatures until they match the power of the creature that entered.