Great find Barook and Tacosnape! Finally, we are able to exclude dead cards (Seething Song, Manamorphose to a less extent) from the combo. Here is a decklist I brewed. Testing will show if 17 creatures are enough.

4 Kor Duelist / Mother of Runes
4 Porcelain Legionnaire / Phyrexian Revoker
4 Puresteel Paladin
4 Stoneforge Mystic

4 Paradise Mantle
2 Bone Splitter
1 Cranial Plating
2 Umezawa's Jitte
1 Sunforger
1 Sword of Fire and Ice
1 Sword of Feast and Famine
1 Sword of Light and Shadow
1 Batterskull

4 Swords to Plowshares / Mental Misstep
1 Hide // Seek
1 Colossal Might
1 Double Cleave

3 Mox Opal
4 Ancient Den
3 Great Furnace
3 Ancient Tomb
2 Plateau
1 Savannah
2 Plains
2 Windswept Heath
2 Flooded Strand