Card
- Set
- Aquapolis
- Number
- 138/147
- Rarity
- Uncommon
- Category
- Trainer
- Type
- Stadium
- Illustrator
- Midori Harada
What it does
This card stays in play when you play it. Discard this card if another Stadium card comes into play. Once during each player's turn (before attacking), that player may flip a coin. If heads, that player chooses 1 of his or her Evolved Pokémon in play and discards the top Evolution card from that Pokémon, devolving it.
Where you can play it
The same check the deck builder makes.
- Ditto Draft
- Expanded
- Gym Leader Challenge
- Legacy
- Standard — Undersea Ruins is not Standard-legal (regulation mark out of rotation).
- Worlds 2015 — Undersea Ruins is from a set that isn't legal in Worlds 2015.