Trade in urborg, darkdepths lilly of the veil and doom wisperer and theres an extra 100-120 for your budget.
Id look for an eldrazi tron list. As they are generally a little cheaper but still effective. There are also mono green and mono blue tron version which aren't as expensive. But still run to play
good build i would add it a secondary win con to help with consistency
best bet is 3-4 Unburial Rites it means adding a little white but you already run Sylvan Caryatid so it doesn't seem like a huge issue 4 cave of koilos (1$ each)
if you do splash a little white you also get Lingering Souls (recon 2-3 of as they are best milled and cast from GY)
also in this scenario avacyn angel of hope is probably worth running as a 1 or 2 of
(her wording is kind of odd but if you look at her oracle text you see she has indestructible that can be taken by flayer)
on a random thought tangent
if you do splash white you could also add in 3 cloudshift and 3 Sagu Mauler, 3Akroma, Angel of Fury as they have good keywords and as you can either mill or play face down for moph 3 then flicker them and they come back transformed
(i know this last recommendation is a bit of a long shot but i thought of it and it looked cool )
EDIT: also maybe Rhonas the Indomitable as good hard cast but also Deathtouch trample (and either indestructible or first strike) is horrific to deal with
second EDIT:
also at the moment the difficulty in triggering delirium makes it really awkward for you to use Traverse the Ulvenwald to its best effect so i recommend SPHINX OF THE STEEL WIND (also provides a reanimation target with different protections (different = more deck flexibility)) (and maybe vault skirge)
Id look for an eldrazi tron list. As they are generally a little cheaper but still effective. There are also mono green and mono blue tron version which aren't as expensive. But still run to play
best bet is 3-4 Unburial Rites it means adding a little white but you already run Sylvan Caryatid so it doesn't seem like a huge issue 4 cave of koilos (1$ each)
if you do splash a little white you also get Lingering Souls (recon 2-3 of as they are best milled and cast from GY)
also in this scenario avacyn angel of hope is probably worth running as a 1 or 2 of
(her wording is kind of odd but if you look at her oracle text you see she has indestructible that can be taken by flayer)
on a random thought tangent
if you do splash white you could also add in 3 cloudshift and 3 Sagu Mauler, 3Akroma, Angel of Fury as they have good keywords and as you can either mill or play face down for moph 3 then flicker them and they come back transformed
(i know this last recommendation is a bit of a long shot but i thought of it and it looked cool
but seriously Unburial Rites is what this decks missing (turn 3 Akroma, Angel of Wrath is a beautiful thing
EDIT: also maybe Rhonas the Indomitable as good hard cast but also Deathtouch trample (and either indestructible or first strike) is horrific to deal with
second EDIT:
also at the moment the difficulty in triggering delirium makes it really awkward for you to use Traverse the Ulvenwald to its best effect so i recommend SPHINX OF THE STEEL WIND (also provides a reanimation target with different protections (different = more deck flexibility)) (and maybe vault skirge)
third EDIT:
Grapple with the Past may be useful in long games as it can bring back a milled Soulflayer