mtg collectors edition commander deck Magic the Gathering: Modern Horizons 3 Set (Set of 4) 000 Commander Deck—The Ruinous Powers Magic: The Gathering - Marvel

Both of these MTG commanders encourage you to pack proliferate effects in your decks and Tidus has the keyword himself

Most stores provide these as participation rewards

Ukkima, Stalking Shadows ability may not be unique, but it's a commander

Emry, Lurker of the Loch She's so pushed in power that she looks like a Modern-only card from Modern Horizons

Storm (When you cast this spell, copy it for each spell cast before it this turn

there are other times when the game presents you with discounted draft tokens , or free gems or gold through the Arena Store, and these are short term deals that I jump all over because they go away in less than a day