Umbral Mantle

Equipped creature has "{3}, {Q}: This creature gets +2/+2 until end of turn." ({Q} is the untap symbol.)
Equip {0}

Yurlok of Scorch Thrash

Vigilance
A player losing unspent mana causes that player to lose that much life.
{1}, {T}: Each player adds {B}{R}{G}.

If you would lose unspent mana, that mana becomes colorless instead.

Untap Victory Chimes during each other player's untap step.
{T}: A player of your choice adds {C}.

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