Keiga, the Tide Star I keep expecting power creep to print a strictly better Keiga, the Tide Star, and thankfully that hasn't happened
Here are the top serialized cards selling on the secondary market Overgrown Tomb: Market value is around $400, with sellers pushing up to $700 Niv-Mizzet, Parun: Market value is around $300 Arclight Phoenix: Market value is around $225, and is selling for the same price Blazing Archon: Market value is around $100, but is selling at up to $300 Top anime borderless card prices Borderless anime treatments appeared in both Collector and Draft boosters
13,331 Inclusions, 2% of 797,953 Decks) If instant-speed interaction is important for the average deck, it's water in the desert for colorless decks
Give up
At least the bestow cards make Hero of Iroas a little less sad looking as he gets to make use of his cost reduction ability
it's just high variance (in some matchups, the opponent doesn't have many generically good cards to steal, which makes things tough)