Akki Battle Squad is a rare Creature — Goblin Samurai card from Neon Dynasty Commander (NEC), collector number 57. Current market price: $5.89, TCGplayer market prices via Scryfall.
Whenever one or more modified creatures you control attack, untap all modified creatures you control. After this phase, there is an additional combat phase. This ability triggers only once each turn. (Equipment, Auras you control, and counters are modifications.)