Rainbows Charge

Rainbows you control get +2/+2
Rainbows you cast cost {2} less to cast.
Whenever you cast a rainbow spell, amass rainbows x where x is its mana cost.
whenever a nontoken rainbow enters the battlefield under you control untap this enchantment and scry 2.
{t} create a 2/1 rainbow with deathtouch for each rainbow you control.