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It is no secret that Pokmon is one of the biggest franchises in video gaming history and has been since its inception back in 1996
When Prediction Princess Coinorma is flipped face-up, you can special summon a level 3 or higher flip monster from your hand or deck in face-down defense position
You can target 1 Ritual Monster you control
So this can be as devastating (or not) as you need it to be, as long as you have Energy cards to discard which is where Coin Bonus, with its extra card draws every turn, becomes even more useful
The potential for card advantage here is huge, especially considering that the card is essentially free. Naturally, being a card from an Un-set, Opening Ceremony is not legal in any sanctioned MTG format