Oketra and Nylea

Indestructible, Vigilance, Reach
Oketra an Nylea is not a creature unless you control
3 or more other creatures that are green and white.
Creature spells you cast cost {1} less for each time a creature you control dealt damage this turn.
{3}{g}{w}: Creatures you control gain Double Strike
and Trample until end of turn.
by PBRunny