Quina, Qu Gourmet is another good way to get extra creatures, as it tacks an additional Frog token on to any other token creation that you do on your turn
For these I have added in Chrome Mox, three new ninja, Changeling Outcast and Kitesail Freebooter
It's so powerful that players will need to find ways to get rid of it by sending it back into a hand or anything that stuns it or instantly kills it to stand a chance
Not only do you get Darksteel Plate, Sword of the Animist, and Fire-Lit Thicket, but Clever Concealment has some amazing new art of Clouds disguise
Discounting activated abilities of of lands you control by 1 is pretty significant and makes cards like Nykthos, Shrine to Nyx (currently ruining lives in Pioneer in a mono-green deck, coincidentally) and Cabal Coffers that much easier to abuse
If youve already amassed a decent board state, this is likely enough to push you over the top in nearly any game