Mercurial Chemister
Attractions and contraptions are both artifacts that exist in their own separate deck, have their own graveyard, have once-per-turn effects, and only come into play with other cards abilities
Im not an aficionado of LoTR lore, but for our purposes today that might actually work out in my favor
There are no shortage of creatures in Magic that produce a lot of mana, but there are very few that produce more than they cost the same turn they come into play
You can Transgress the Mind a Chandra, Flamecaller or Collected Company, but it isnt the same as being able to get their mana out of the way as it happens and not having to have your answer line up before their threat
We dont want too much cuteness in our Draft decks, but having two or more Ponyback Brigades often makes it correct for us to include a single copy of Rush of Battle in our main deck