Merieke Ri Berit

Merieke Ri Berit doesn't untap during your untap step.
{T}: Gain control of target creature for as long as you control Merieke Ri Berit. When Merieke Ri Berit leaves the battlefield or becomes untapped, destroy that creature. It can't be regenerated.

Bitterblossom

At the beginning of your upkeep, you lose 1 life and create a 1/1 black Faerie Rogue creature token with flying.

Command Tower

{T}: Add one mana of any color in your commander's color identity.

Wrath of God

Destroy all creatures. They can't be regenerated.

Mind Over Matter

Discard a card: You may tap or untap target artifact, creature, or land.

Bribery

Search target opponent's library for a creature card and put that card onto the battlefield under your control. Then that player shuffles.