Provoke the Trolls is a red spell that buffs a creature by 5 power if it survives the 3 damage the spell deals to it, while the third chapter of Waking the Trolls creates a bunch of 4/4 Troll Warrior tokens
This can be particularly useful if youre interested in showing off a favorite bit of pop culture or indulging in slightly more mature designs
We've already got Dreamtail Heron too, which is helpful
Clearly you want this in an artifact-themed deck, especially if youre sacrificing them, but treasure themes also help it along, as does any kind of resource token deck like Blood tokens or Junk tokens
Added as wildcards, they've been mechanically designed for use in the Commander format, and won't be available in the set's precon Commander decks - so if you want these, you'll have to start tearing your way through a few booster packs
You complete a Collection Quest by buying booster packs, and trading with others to complete a quest booklet of the cards you need to find