In one of my advertising classes, I stumbled onto a neat little tool called a psychographic profile
If you are capable of healing your cards, through items, actions, or character abilities, and Beast, Tragic Hero has damage on them at the start of your turn, you can let them attack and then heal them, allowing you to still benefit from the increased strength but keeping them healthy enough to stick around
The question we have to pose is that in 2024, is Pauper a cheap format still
This isnt to say the Tyranid Swarm deck is bad at all
Its also a solid roleplayer in green decks that want to use Green Sun's Zenith as a turn-1 mana dork or that want a cheap creature to sacrifice to Natural Order
Budget Options If you want to lower the cost without changing how the deck plays, start with the expensive dual lands