kdm card sleeves Kingdom Death: Monster Compatible Sleeve Bundle Nights Fall 1200PCS MTG Card Sleeves, Katomula

If budget is the top priority, this is your pick

The card is awfully nice with Deputy of Detention and Selfless Spirit in the mix, I have to say

Each hero corresponds to one of the factions, allowing for a variety of ability combos

Sure, MulldrifterMulldrifter has been around longer and has been printed way more than the Horizons Elementals, but it has staying power because drawing cards is one of the most powerful things you can do in the format, and because it takes a light breeze to blink, reanimate, bounce, replay, or otherwise reuse this

With Shay joining the Duel, the Field Spell Card "Crossover" is activated, as per the rules of an Action Duel