Bilious Skulldweller, Venerated Rotpriest, Crawling Chorus, Glistener Elf, and Skrelv, Defector Mite are all cards you want to deploy on turn 1 to get in that pivotal first hit
With Mono-White (a problematic match-up) potentially making a comeback with AFR, all these cheap interaction spells should help
You have a reasonable likelihood of it sacrificing itself before you get to two 5/5s, and potentially before you get to draw any cards
you add one of these to your hand each time one you defeat an opponents Pokmon, and claim victory if you pick up all six before your rival
Plague Mare is obviously not as good, as its a 2/2 instead of a 3/3 with first strike, and it doesnt deal damage to the opponent or planeswalkers they control, but it does have some upside