Mono Red Rally floods the board with small creatures and tokens, then goes for a sudden alpha strike: Rally at the Hornburg adds two 1/1 Human tokens with haste, and a kicked Goblin Bushwhacker gives the team haste and +1/+0. Arms of Hadar is excellent here, wiping their Burning-Tree Emissaries, Goblin Bushwhackers, and Rally tokens in one sweep. Relic of Progenitus doesn't stop their plan directly but provides incidental graveyard disruption; more importantly it's a cheap artifact that can be exiled for {1} to exile all graveyards and draw a card, so it replaces itself if needed. Plunder the Trollshaws is too slow in a race against an explosive curve-out deck, and Extract a Confession is a liability since they will simply sacrifice their least valuable creature. Keep Counterspell and removal up to answer Rally at the Hornburg and key enablers before they go wide.