There are dozens of ways to get cards into your graveyard, such as cards that tutor cards to graveyards, loot or rummage effects, mill cards, surveil, dredge, and discard effects
This is how Marvel Snap's retreat mechanic works
Unite, by definition of its differentiation, leans into what makes Pokemon special by assigning each Pokemon a role
Random discard effects are also among the few ways to discard opposing lands
Since siege battles force an opponent to protect them, we can safely bet therell be battles that task their own caster with defending them
Alela, Artful Provocateur Alela, Cunning Conqueror Archmage of Echoes Bitterbloom Bearer Bitterblossom Cloudseeder Faerie Aerie Faerie Artisans Faerie Formation Faerie Slumber Party Feywild Caretaker Feywild Trickster Feywild Visitor Glen Elendra's Answer Improbable Alliance Into the Fae Court Mischievous Mystic Oona, Queen of the Fae Pestered Wellguard Violet Pall