Shaun, Father of Synths

合成人之父尚恩 (Shaun, Father of Synths) (zhs)

Legendary Creature - Human Scientist | Power/Toughness: 3 / 4 (CMC 5)
Whenever you attack, you may create a tapped and attacking token that's a copy of target attacking legendary creature you control other than Shaun, except it's not legendary and it's a Synth artifact creature in addition to its other types.
When Shaun leaves the battlefield, exile all Synth tokens you control.