Ritual of Unlocking

Ritual of Unlocking can't be countered and can't
leave the battlefield.
As an additional cost to cast Ritual of Unlocking,
sacrifice three permanents and all but three lands
you control.
Whenever you tap a land you control for mana,
add {w}{u}{b}{r}{g}{c} in addition to the mana
the land generates. You may draw two cards.