mtg cards that double counters Doubling Season (Toppers) [Double Masters] Lightly Played Foil 0 Toughness Spark Double | MagicArena Wiki

You can constantly remove the second counter from The Eldest Reborn to force your opponents to discard a card on every one of your turns, turn Binding the Old Gods into a repeatable Maelstrom Pulse each turn, or get a steady stream of card draw or +1/+1 counters from The First Iroan Games

Magical Maneuvers is also a nice way to return something to your hand to help gain lore as well

Even just tossing around a Shuko to make this bird wizard trigger is pretty awesome

We only have 8 creatures and 36 lands, so that's pretty likely

This has appeared in Modern sideboards, and might be worth keeping some foils around on