Anything that costs a single Wonder Stamina probably only consists of common cards you'll likely pull out of Booster Packs yourself
Overall, Gardevoir ex will still be a prominent strategy , but it will be nowhere near as powerful as it is now
The two complement each other as well, as when one is no good the other is likely to be welcome both against different decks and in different situations
3/4 Hazagan, the Stormbright 2URW Legendary Creature: Human Wizard (Rare) As long as you control an adventuring party, creatures you control have, whenever this creature attacks, it deals damage equal to its power to target player. 1/7 Out of the Dungeon 2B Sorcery (Common) Return from your graveyard up to one warrior, one wizard, and one rogue to your hand
Case in point, see the Amonkhet plains that was posted above