It will let all of your sources deal double damage until your next turn, so that's now on your turn, you attack, your damage-based sorceries and loads more
Its a pure nostalgia play aimed at tapping into the brains of people who first got into the Pokmon trading card game as kids when it started, have probably since fallen off, and now have nieces, nephews, or kids of their own, and enough disposable income to be willing to spend money to relive their childhood glory days, or at least get back that beloved foil card they lost, traded away, or had stolen back in the 90s
Watch here youtu.be/j8ALMUvNVh0 Thank you @wizards_magic for an awesome preview card
Theyre just different names that get applied to different types of the same creature, a canine
Kastral, the Windcrested Move over, Kangee, Aerie Keeper, we have a new Bird typal commander, and its Kastral, the Windcrested