It gives lifegain on entry triggers and rewards you with card draw once you hit the life threshold, so routine board development keeps paying you back
(You can of course skip the adventure, if you wish, and simply cast Kellan from your hand.) Decadent Dragon (and its adventure, Expensive Taste) is another card that is almost guaranteed to be a powerhouse in Constructed formats, is
These options are vital for decks weak in specific colored interaction
Heres what you can expect from each deck: Lorehold Spirit (white-red) Commander: Quintorius, Strategy: Create Spirits as cards leave your graveyard, and then buff them in order to deal massive damage
For Demolition Field, I don't know if I'd said this yet on TappedOut, but I'm of the oppinion that each and EVERY deck needs some form of land removal
We've already seen Noise Marine comes with the cascade keyword attacked, and it's also included the newly revealed card Let the Galaxy Burn