The shard-plane of Esper grew to become a magocracy focused on using etherium to complete the Noble Work of enhancing all life with the metal
If you use sleeves, then every time you play with one of those cards you have to take the card out at some point and eventually put it back in
It's a standard green filter draw that fetches a creature or land, but since it increases your hand size when Magecrafted, you want to aim to cast it that way as much as possible
For as long as the game has been around, there have been discard spells
Theres no shame in running Zirda, the Dawnwaker at the helm, no pun intended, but the creatures on todays list are more thematically focused
Other Creature based Mana creators like Marwyn, the Nurturer and Selvala, Heart of the Wild all do that part to push too