Endbringer

Untap Endbringer during each other player's untap step.
{T}: Endbringer deals 1 damage to target creature or player.
{C}, {T}: Target creature can't attack or block this turn.
{C}{C}, {T}: Draw a card.

Untap this creature during each other player's untap step.
{T}: This creature deals 1 damage to any target.
{C}, {T}: Target creature can't attack or block this turn.
{C}{C}, {T}: Draw a card.

Modern Horizons 3 Commander

Untap Endbringer during each other player's untap step.
{T}: Endbringer deals 1 damage to any target.
{C}, {T}: Target creature can't attack or block this turn.
{C}{C}, {T}: Draw a card.