Unlike other mechanics from Bloomburrow (mostly offspring), expend is flavor-neutral, so any card from any setting could have abilities triggered by expend
Card Types The diverse array of card types adds layers of complexity to gameplay
Artifact Ramp (CTRL to add secondary) Recursion Nim Deathmantle Equipped creature gets +2/+2, has intimidate, and is a black Zombie
Tyranid Swarm Tyranid Swarm is a classic Temur beatdown deck that features some aggressive, stompy creatures and scaleable creature threats based around +1/+1 counters
(It doesn't matter who controls the Aura or who controls Simic Guildmage.) If no such permanent exists, the Aura doesn't move
Lands that can become a creature have historically been a good way for decks to reduce the impact of flooding, and Urzas Saga is the best in the business