I based my recommendations off my deck Hydra Rampage boi StoryArcher on Don't Let Em Breathe (Quick) 3 years ago I hadn't messed with the counter deck in a while, so I just ran a quick playtest
Think Ruin Crab or Altar of the Brood: Theyre powerful, but require the mill player to put some work in to make it happen
5 Scion of the Ur-Dragon WUBRG Dragon For The Win Dragons are always a popular creature type among MTG fans (and fans of the fantasy genre in general, for that matter), but there are surprisingly only nine WUBRG Dragons including the first one ever: Scion of the Ur-Dragon from 2006s Time Spiral expansion
Channeler was a very good addition to blue-red Spellslinger decks, and took the spot of the Legacy Delver in Modern being a reliable 3/3 flyer for one mana
One way to keep the price of your control deck down is by focusing on commanders with as few colors as possible to keep the mana base cheap
Arcbound Worker Ah, the classic worker peon