This green artificer can be very effective in any token build and can even help you close out a game if you have enough token creatures
There around 40k decks registered for this on EDHREC.com but no major leaders most only have a few hundred each
Uncommon (Diamond symbol): Slightly more challenging to find, uncommon cards typically include trainer cards, stage 1 Pokmon, and some special energy cards
Faceless Haven is essentially worth splashing for in every monocolor aggro deck, and the Battle for Zendikar cycle of Shambling Vents / Needle Spires / Hissing Quagmire / Wandering Fumarole / Lumbering Falls saw widespread play during its time in the format
and thats not putting them down
Since rules aren't enforced automatically, players must manage everything themselves, making Untap.in feel more like a virtual tabletop than a guided game client