We know from Smuggler's Copter how good a two mana vehicle can be.

Aether Revolt is pushing that limit even more with Heart of Kiran. Make no mistake... This card might be bananas. Imagine playing Heart of Kiran on turn two, then following up with Liliana or Nissa on turn three. You can slam with the Heart of Kiran and still gain ground on the battlefield by destroying a threat or making a Plant.

There are two important things to take away from this card:

1. You basically get to access Planeswalker loyalty twice per turn. The first use is the regular one; the second is a swing with Heart of Kiran.
2. Because Heart of Kiran has vigilence, it can block. Got a spare loyalty? You can spring a 4/4 blocker on demand. The best thing? At least early in the Heart's career, you may be able to steal a body or two.

Some of the cards in Aether Revolt -- most notably Ajani Unyeilding -- imply a Planeswalker collective deck. Heart of Kiran might be great in that kind of deck, a two drop that comes down faster than any Planeswalker in Standard, and capable of thriving in a context rich with loyalty.

As explosive as the loyalty-leeching alternate crew cost may be, the regular crew cost on this card is challenging. Crew 3 is much harder to hit than Crew 1; Nissa was already struggling in a Smugger's Copter-first format, but at least Gideon could make 2/2 creatures. Now even [one of] Gideon's tokens need assistance. Not a fatal flaw to this card at all... But something, certainly, to be wary of as you select your creatures.