Isshin could basically be an alternate Commander for this deck, so it makes a lot of sense to get him added
Lighting, Grass, and Steel are for Pikachu ex and supporting acts like Joltik, while the Water Energy is to help Quaquaval deliver an attack if needed
Look out for cards like Soaring Thought-Thief, Vantress Gargoyle, and Drown in the Loch to play in mill Commander decks
Worst-case scenario, you can flash it in at the end of your opponents turn and start attacking
On top of all this, Wan Shi Tong punishes your opponent for searching their library - not in the same way as Aven Mindcensor, but by rewarding you with an extra +1/+1 counter and a card
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