The rulings on this card's skill to attack multiple Units at once are the same as the rulings provided for Dragonic Kaiser, Vermillion. These rulings, adapted to Poseidon, are:
- Poseidon attacks 2, 4 or 6 Units at one time, depending on the number of cards discarded for his Persona Blast.
- Attacked Units cannot Intercept, or activate skills which move them to the Guardian Circle from the field if they have such skills.
- You perform only 1 Twin Drive.
- Each attacked Unit must be guarded separately.
- Perfect Guard Units only work on one attacked Unit per Perfect Guard.
- If hit, the skills of Aermo (and clones of Aermo) activate for the number of hits (if Poseidon hits 5 times, you may discard 5 cards and draw 5 cards).
- The Persona Blast of Mandala Lord affects every battle Poseidon is involved in. Therefore, it lowers Poseidon's Power by 10000 in all 2, 4 or 6 battles, not just 1.