silk or silver

Tunnel's reaction triggers whenever you discard it outside Clean-up — Warehouse/Embassy/Storeroom-style sifters do that constantly.

Cheap alt-VP piles score best when you can gain/buy many cards per turn to pad the deck count — the generalized Beggar/Gardens pattern.

Feodum scores 1VP per 3 Silvers and hands you 3 more when trashed — Masterpiece/Trader/Jack of all Trades/Bureaucrat stack Silvers fast.

Merchant/Sauna-style Silver-play bonuses scale with how much Silver you can stack via mass gainers.

Fortress/Rats/Feodum/Squire-style cards want to be trashed repeatedly; trash-for-benefit cards are happy to oblige.

Tunnel/Village Green/Faithful Hound-style discard payoffs trigger constantly alongside heavy sifters, extending the sourced Tunnel + sifter pairing.

Crossroads/Shepherd-style payoffs for revealing/discarding Victory cards pair naturally with Gardens/Silk Road-style rush plans.