Ashnod Vanguard Whenever a creature deals damage to you, destroy it
What are the chase cards in Dark Phantasma (S10A)
The themes clear: flames consume plants and warp steel, so Fire cards are perfect for shredding those strategies
Hardened Academic Hardened Academic is substantially better than random creatures that grow when cards leave the graveyard because its counters can go anywhere, so you gain great flexibility on top of a cheap threat
Banishing Knack + Mirran Spy + Ornithopter Love the low costs on this one, begin with Mirran Spy and Ornithopter in play, cast Banishing Knack and target Mirran Spy
Lastly, it doesnt shuffle from your graveyard back into your library, allowing it to be abused by a reanimation effect or brought back with something like Den Protector