Metallus, Magos Errant

When Metallus, Magos Errant enters the
battlefield, create two 1/1 blue Thopter
artifact creature tokens with flying.
{2}, Sacrifice two artifacts: Choose one-
• Metallus deals 3 damage to target player or
planeswalker.
• Target creature gets -4/-4 until end of turn.
• You gain 5 life.