"We're taking back what's ours. And a little bit of what's yours."

Port Razer

Whenever this creature deals combat damage to a player, untap each creature you control. After this phase, there is an additional combat phase.
This creature can't attack a player it has already attacked this turn.

Special Guests

Whenever Port Razer deals combat damage to a player, untap each creature you control. After this phase, there is an additional combat phase.
Port Razer can't attack a player it has already attacked this turn.

"Smash and grab, loot and burn, then it is the next town's turn!"

The Lost Caverns of Ixalan Commander

Whenever Port Razer deals combat damage to a player, untap each creature you control. After this combat phase, there is an additional combat phase.
Port Razer can't attack a player it has already attacked this turn.

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Commander Legends

Port Razer doesn't have to attack in any additional combat it creates (or any other time for that matter).

Port Razer's last ability doesn't stop it from attacking a planeswalker or battle during any combat.