Cybernetica Datasmith does not have summoning sickness.
You control a creature that can tap to add ({U} magic symbol) .
Steps
Activate a creature you control by tapping it, adding ({U} magic symbol) .
Activate
Cybernetica Datasmith by paying ({U} magic symbol) and tapping it, causing a player to draw a card and another player to create a 4/4 Robot creature token.
The Robot enters the battlefield, triggering
Intruder Alarm, untapping all creatures.
Repeat.
Results
Infinite creature tokens for any number of players.