Obviously at a surface level almost every set mechanic works this way: once you start building around a theme like spellslinger or cat typal or domain, and choosing spells which support or are empowered by that theme, you may as well add more
Swampcycling ( , Discard this card: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.) Creature - Troll Color tag templates(None) Viridian Emissary When this creature dies, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle
This is a wrath for your small creature deck, but it's also wrath protection that helps you rebuild after an opponent casts their sweeper
Once Marwyn can tap for enough mana, these untap effects can let you repeatedly tap and untap her, generating functionally infinite mana in the process