The Replenish deck could sit back, lose card advantage turn after turn with Attunement, and still come out and win at its leisure as Parallax Wave, Opalescence, Seal of Cleansing, and other enchantments all entered play at the same time
They can also untap a mana rock or even better a mana rock that can make more than 1 mana Sol Ring, Worn Powerstone, Palladium Myr, Thran Dynamo, Hedron Archive, Gilded Lotus, etc
Not an easy feat to pull off
It can also help you dodge targeting Effects in a pinch
The rare cards described here are not only valuable collectibles, but also an important part of Pokmon Trading Card Game history.
How do you feel about running extra turn cards like Final Fortune in the deck