Shaun, Father of Synths {3}{U}{R}
Legendary Creature — Human Scientist
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.
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Redoubled Stormsinger 85%
$0.25#3402
"Whenever this creature attacks, for each creature token you control that entered this turn, create a tapped and attacking token that's a copy of that token. At the beginning of the next end step, sacrifice those tokens."
Mirror Mockery 83%
$0.45#12966
"Whenever enchanted creature attacks, you may create a token that's a copy of that creature. Exile that token at end of combat."
Satya, Aetherflux Genius 83%
$0.28#6169
"Whenever this card attacks, create a tapped and attacking token that's a copy of up to one other target nontoken creature you control. You get {E}{E} . At the beginning of the next end step, sacrifice that token unless you pay an amount of {E} equal to its mana value."
Flamerush Rider 83%
$0.17#4715
"Whenever this creature attacks, create a token that's a copy of another target attacking creature and that's tapped and attacking. Exile the token at end of combat."
Mardu Siegebreaker 82%
$0.46#3889
"Whenever this creature attacks, for each opponent, create a tapped token that's a copy of the exiled card attacking that opponent. At the beginning of your next end step, sacrifice those tokens."
Mirror-Style Master 81%
$0.27#12093
"Whenever this creature attacks, for each attacking modified creature you control, create a tapped and attacking token that's a copy of that creature. Exile those tokens at end of combat."
Nacatl War-Pride 81%
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"Whenever this creature attacks, create X tokens that are copies of it and that are tapped and attacking, where X is the number of creatures defending player controls. Exile the tokens at the beginning of the next end step."
Sunfrill Imitator 81%
$0.80#3713
"Whenever this creature attacks, you may have it become a copy of another target Dinosaur you control, except its name is this card and it has this ability."