Budget deck : Ezreal, Prodigal Explorer

Ezreal, Prodigal Explorer exhausts to draw 1 as a Reaction once you have chosen enemy units or gear twice in a turn with spells or unit abilities. Stupefy plus Gust is 2 energy for that card. Trade cheaply, keep drawing, outlast them.

Mulligans: keep two of Stupefy, Gust and Mesmerize and a 3 cost unit (Evershade Stalker, Bewitching Spirit or Pickpocket). Send back Angler Beast, and Turn to Dust against a deck with no gear.

Early game: Evershade Stalker discards 1, then draws 1: discard Dredge Up or Up from the Deep, Flow replays it from the trash. Bewitching Spirit makes the opponent discard 1. Hold Reactions for their turn, fire on yours only to clear a blocker. Take Void Gate for +1 damage on spells and abilities, Frozen Fortress against small units (1 damage to each unit there every Beginning Phase), Sigil of the Storm against aggro (its conqueror recycles a rune).

Mid game: Ezreal, Dashing deals his Might, 3, to an enemy unit there when he attacks or defends (4 at Void Gate), but no combat damage. After the hit, a Mind rune and his Action send him home. His hit plus one spell turns on the legend. Mesmerize gives -2, then Gust returns a 5 Might unit at a battlefield. Frigid Touch with Repeat makes two choices alone. Hide Wages of Pain for a rune at a battlefield you control: from the next turn it is a free Reaction there, 3 damage. Kha'Zix, Mutating Horror has Ambush and fights a lone enemy unit as a 6.

Late game: Angler Beast returns every unit with 2 Might or less: shrink their best first with Frigid Touch, Mesmerize or The List (name their champion). Your Bewitching Spirit returns too, for another discard. Bounces cost them energy, Spirit thins their hand, the legend fills yours. Insurance: Mesmerize saves Ezreal, Dashing from removal.

Mistakes to avoid: - One Reaction when two would draw a card - Counting The List or Bewitching Spirit for the legend - Angler Beast with your Tentacles on the board - Ezreal, Dashing left in a fight he cannot survive