Yuna is seeing play in Standard, and Sephiroth is being tested across multiple formats
By revealing upcoming cards, it can hint at whether an evolution is on its way, allowing for adjustments in strategy
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Whats not intuitive are all the different currencies and items that you win in these battles
Copying enchantments is already strong, but duplicating sagas like Summon: Bahamut can be game-breaking and snowball your board state into overwhelming dominance
Ethereal Investigator As I mentioned in my Type Four conversations online about including this card in our Type Four stack where investigate cards can be paid immediately, "This is better the more players you have." I mean we run cards like Mulldrifter (which is also free if you evoke it), Cloudblazer, Sphinx of Uthuun, and Sphinx of Enlightenment for card flow from a dork, but if you are running around too many duels, then this is essentially a mana 2/3 flyer that replaces itself and makes 1/1 Spirits with flying on your 2nd card drawn each turn, so one with the Clue after you sac it