pokemon trainer card n Supporter Black & White Supporter Rarity N 105a/124 - Pokémon Extended

Both of these cards are strong and work really well for your needs

Capacious Bucket offers the excellent opportunity to search your deck for up to two Water Energy and place them into your hand

Not only will he fit in multiple existing shells out of the gate, hell be a worthy candidate for nearly any deck that generates black mana in Standard in future

Mew ex: Refills your hand with its Restart ability

The effect of Gifts Ungiven instructs you to find up to 4 cards in your library (which is a hidden zone)

Although cycling had been used repeatedly, it was not considered to be deciduous until Streets of New Capenna