When Mantle of the Wolf is put into a graveyard from the battlefield, create two 2/2 green Wolf creature tokens
Deepfathom Skulker
Lifelink and flying make this 7/7 body quite the game ender, you need a good removal spell to take him down else he is going to make devastating life swings and give more gas than you could possibly need
Then, at the beginning of your end step, you can either pull a creature back to your hand from the yard or, if you have enough counters, straight back to the battlefield
That's great value, allowing you to reuse powerful enter-the-battlefield effects for free, while ramping at the same time
But specific design choices made them even more special: every Gold Star card depicted the Pokmon in its "Shiny" (alternate color) form, marking the first time shiny Pokmon were systematically featured as a specific rarity type since the "Shining" cards of the Neo era