arabella mtg commander deck Arabella, Abandoned Doll | Duskmourn: House of Horror Foil | Standard Commander Deck Spotlight: Arabella, Abandoned

For example, Forge Anew is a gamechanger for this and all equipment decks

Each time you proliferate, you can choose any permanent that has a counter, including ones controlled by opponents

Uncounterable is a nice perk although not that frequently relevant

Whispers of the Muse (T1, Ext, S, Block) A favorite in "Turbo Xerox" (a blue deck which used minimal land but a ton of cantrips to thin out the deck), Counter-Phoenix (Shard Phoenix + Forbid) and Tradewind-Awakening (put Awakening on the stack, tap all your lands for mana, untap all your lands), Whispers has what might seem like a hefty price to pay for one card but you get to do it turn after turn after turn