Saffiyah, the Summoner

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