Demolisher Spawn The lack of trample on that buff severely restricts Demolisher Spawns power, but +4/+4 is +4/+4, a pretty significant green buff, especially with tokens
And then, as we already know, she can essentially Kiki-Jiki, Mirror Breaker one of your artifacts or dorks, making an artifact critter copy for a turn to smash
TL;DR: The Wilds Unknown top decks (Steelsong at 19%, Bounce at 16%, Ruby/Sapphire Items at 12%) remain the competitive backbone at Set 13 launch
19 Kwain is a simple group-hug machine that opens your deck up to plenty of blue-white synergies
The cards condition and version will affect its value
The problem with Devastation Tide is that spending all that mana and a card to wipe the board is all well and good but it doesn't deal with anything