With a cost-reducing effect and a haste anthem, Warchief pours gasoline directly onto the fire of an already aggressive creature type
Readying Cards (Untap) At the start of your turn, the first step in the Beginning phase is Ready when you ready all of your cards
The activated ability is super expensive for what it is, and cost reduction barely matters in Limited
Discard Foil / Discard Foil Filler Card V1: Population 1
I know I said that this is more of a competitively slanted card, but it actually has some decent chops in EDH as well at around 1000 decks its a big player in both mill decks and Rogue decks (and mixtures of the two), of course being very popular with Anowon, the Ruin Thief
It has haste, so it can attack right away, and its "delirium" effect not only boosts it from 3/2 to 4/3, but gives it the "trample" ability