Fountain of Youth could be used in very grindy decks that want to trigger cards like Drogskol Reaver or flavorful Jodah, Archmage Eternal lists
Throw in a strong sacrificing theme, and this deck is great for getting a player used to how winning a game isn't always just about attacking whenever possible
If you chose Nessie: 20% chance to just search a new Danger to replace the discarded Nessie
The one from my friend (first picture ) were full texture foil, with texture on the image too
In no particular order, here is what I would consider meta decks: Regidrago VSTAR Toolbox (usually with Garbodor) Lugia VSTAR / Archeops with Double Dragon Energy Palkia VSTAR Shadow Rider Calyrex VMAX Stall, usually focused on Wobbuffet [Phantom Forces] or Snorlax [Pokmon Go] Fusion Strike decks, either focused on Mew VMAX, or Turbo Meloetta (with Dimension Valley) Of course, you then have other archetypes like Lighting stuff, Dark stuff, Arceus & Dialga & Palkia-GX / Dragonite V, Tsareena V, etc
However, if such a creature can't attack players other than you, it must attack you (unless you control it) or a planeswalker or battle it can attack