Tek, Magus of Suns

You may pay {w}{u}{b}{r}{g} rather than pay the mana cost for spells that you cast.
Whenever you cast a spell, if you spent {w}{u}{b}{r}{g} to cast it, it can't be countered. Any player may pay X to ignore this ability, where X is that spells converted mana cost.
"A thousand worlds at the snap of a finger. Where will I take us next? "