Oftentimes, theyre just giving a three-mana 2/2 some ability that makes it better than one without an ability
[+1]: Until end of turn, each planeswalker you control becomes a 4/4 red Dragon creature and gains flying
Riders of Rohan lands on this list because it's a fairly straightforward Jeskai deck that focuses on getting creatures on the battlefield, increasing their power and toughness, and swinging at your opponents for big damage
The only caveat with this card is it can't attack during the extra turn
Harmonic Prodigy Many of the cards on this list feature game-breaking triggered abilities or stupendously powerful ETB abilities and others, like Naban, Dean of Iteration, can double up those triggers so long as theyre ETB abilities
A robust lifegain engine will grant you access to plenty of card advantage to keep up with the downside