Though it's still several days away from the time of this publishing, MTG fans are eagerly anticipating what the set will bring
Stocking your graveyard with lands unlocks the powerful Vengeful Regrowth, ramping you three lands from your graveyard and making three 4/2 Plant Warrior tokens that are particularly fierce with Kirri on the battlefield
Pidgeot ex is one of those cards
Emerge from the Cocoon Four generic, one white sorcery Common Return target creature card from your graveyard to the battlefield
Green's arguably the color best if you like (or need to) splash or move into three colors
The first one because I'm missing exile-based removal, and the second one because it fits with the idea of multiple tokens, in addition to having a touch of religious fanaticism, something that connects well with Shadowheart's mentality