UUD, Evolving Wilds, Vampire Nighthawk, Scavenge the Slitherhead to the Nighthawk, done.
Spidey: 19
Hand: 1
Library: 48
Battlefield:
(T,T,T) Mt x3
(T) Swamp
(T) Rakdos Guildgate (~ ETB tapped.; T: Add B or R to my mana pool)
(T) Rakdos Cackler (2/2 from ctr; R: ~ gets +1/+0 ueot from Pairing w/Stonewright; Unleash (I may have this creature ETB with a +1/+1 ctr on it. It can't block as long as it has a +1/+1 ctr on it)) *1 +1/+1 ctr* *Paired w/Stonewright*
(T) Rix Maadi Guildmage (2/2; BR: Target blocking creature gets -1/-1 ueot. BR: Target player who lost life this turn loses 1 life)
(T) Rix Maadi Guildmage (2/2; BR: Target blocking creature gets -1/-1 ueot. BR: Target player who lost life this turn loses 1 life)
(S) Stonewright (1/1; R: ~ gets +1/+0 ueot from Pairing w/Cackler; Soulbond, As long as ~ is paired with another creature, each of those creatures has "R: This creature gets +1/+0 ueot".) *Paired w/Cackler*
Graveyard: Pillar of Flame, Searing Spear
Exile:
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Oversoul: 8
Hand: 2
Library: 48
Battlefield:
(T) Swamp
(T) Forest
(T) Golgari Guildgate (~ etb tapped. T: Add B or G to my mana pool.)
(U) Evolving Wilds (T, sac ~: I search my library for a basic land and put it onto the battlefield tapped, then shuffle my library.)
(U) Korozda Guildmage (2/2; 1BG: Target creature gets +1/+1 and gains intimidate ueot. 2BG, sac a nontoken creature: Put X 1/1 green Saproling tokens onto the battlefield, where X is the sacrificed creature's toughness.)
(S) Vampire Nighthawk (3/4; Flying, deathtouch, lifelink.) *1 +1/+1 counter*
Graveyard: Dawntreader Elk, Ultimate Price
Exile: Drudge Beetle, Slitherhead