Rainbow of fog

{10}:Pervent you loseing the game.You actually Gain 20 life!!!!!!!!!!!!!!!!!!!!!!!{9}:Scry 20. Discard your hand. draw 7 cards.{10}{10}:Create 20 1/2 Gold Rainbow tokens. {4}{ut}: create a 1/2 Rainbow. Rainbows have +4/-1. {8}: Search your library for Rainbow Gathering. Rainbow of fogs power is = to how many mana you spent to cast this spell. Flying, Shroud, Kloom.( if this deals damage to a player, creature or planswalker, ability's cost 3 more.