Nizedia, Instigator Mage

Partner with Vivior, Angel of the Lotus or
Tanka, World Creator
{u}{u}, Exert this creature: Untap all other permanents you control
{u}{7}, Sacrifice all permanents you control: Take control of all permanents another player controls, you may use mana as though it were mana of any type to pay for abilities
of those permanents