The real issue with these Evoke Elementals is that players figured out pretty quickly that they could cheat the intended free downside of the card
For Standard, I imagine Jeskai Ascendancy could easily be the centerpiece of a token-convoke deck that deploys Ascendancy, makes a bunch of tokens on turn 4 and wins with those and Ascendancy triggers on turn 5
Rakdos, Lord of Riots I adore the design of Rakdos, Lord of Riots
(Editor's Note: We have clarified the maximum number of mythic rares that can be opened in one Set Booster pack.) Here's what you'll find inside: 1 Snow land (basic or dual land, possibly foil) 1 Rare or mythic rare (can be showcase or borderless) 1 Snow common or uncommon, showcase uncommon, or exclusive rare (see below) 1 Foil card of any rarity (can be showcase or borderless) 1 Non-foil card of any rarity (can be showcase or borderless) 7 Commons and uncommons 1 Art card (1 in 20 are foil-stamped) 1 Ad card or card from The List For the first time, Kaldheim contains 20 cards (5 rares, 15 uncommons) that can be found exclusively in Set Boosters and Theme Boosters (you can also find the rares in Collector Boosters, and a handful are included in Commander decks)
Despite this is it very well suited to its task and incredibly powerful
There are no brakes on that ability to reduce its power