I have used it myself ever since I bought my quartet for $120 back in 1999 when that seemed like an expensive deal
In particular, it shines in red decks that care about spell casting, such as Zada, Hedron Grinder , Torbran, Thane of Red Fell , or prowess-based commanders
The card game prevents Active Pokmon inflicted with the Sleep and Paralysis status effects from being withdrawn and swapped with another Pokmon from the Trainer's bench (the equivalent of the Trainer's party)
So both Jace and Chandra have a variety of ways in which they can pay for themselves in two activations
In the right deck, this effect is absolutely ludicrous for two mana
Why draw a ton of cards with this new Walker when Walking Ballista just wins the game