The first is a triggered ability: "When this permanent enters the battlefield, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle their library." (2023-11-10) Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text
It does ask for a well-stocked graveyard and while Tricky Terrain isnt super adept at making that happen, there are plenty of Commander decks out there that can
When attached to a Metal Pokmon card, that Pokmon takes ten less damage from the opponent's attacks
Almas ability cant be used again (it states Once during your turn), but Pepas can
And with that criteria the answer is clear
This standardization also improves card shuffling during matches because cards move smoothly without catching uneven edges