Healer's Hawk is one card I'll definitely be using. I have a White Weenie deck with Vault Skirge, so it's basically just replaced. I did consider the edge cases of it not being hit by Doom Blade, and not as affected by Prismatic Strands/Circle of Protection: White, but those probably don't matter as much as being ahead on the race.
I also considered Urban Utopia as a replacement for Nylea's Presence in my Enchantress deck that runs 4x Abundant Growth and 2x Nylea's Presence. The deck only runs 15x Forests for it's basic lands, so the ability of Nylea's Presence to turn on Utopia Sprawl is irrelevent. Also Urban Utopia isn't effected by River Boa or other landwalkers/basic land hosers, but Nylea's Presence protects a land from Choking Sands, which ultimately may be the more relevant edge case.
I also considered Urban Utopia as a replacement for Nylea's Presence in my Enchantress deck that runs 4x Abundant Growth and 2x Nylea's Presence. The deck only runs 15x Forests for it's basic lands, so the ability of Nylea's Presence to turn on Utopia Sprawl is irrelevent. Also Urban Utopia isn't effected by River Boa or other landwalkers/basic land hosers, but Nylea's Presence protects a land from Choking Sands, which ultimately may be the more relevant edge case.
Corrupt Control B | Burn R | UG Turbofog UG | White Weenie W | GW Tethmos WG | BG Cycling Combo BG
Enchantress GBW | Colorless Tron C | Red Deck Wins R | UG Madness UG | Mono-G Tron G | UR Puzzlehorns UR
Rhystic Tron WU| WU Prowess WU | BR Reanimator BR | Mono-R Control R | Stompy G | Temur Tron URG
Mardu Infinite Priest WBR | 85-Card Dredge BRG | Elves GU | Boros Bully RW | Jeskai Familiars RWU
It protects it since Choking Sands destroys a "non-Swamp" land, and Nylea's Presence makes the land a Swamp!
Corrupt Control B | Burn R | UG Turbofog UG | White Weenie W | GW Tethmos WG | BG Cycling Combo BG
Enchantress GBW | Colorless Tron C | Red Deck Wins R | UG Madness UG | Mono-G Tron G | UR Puzzlehorns UR
Rhystic Tron WU| WU Prowess WU | BR Reanimator BR | Mono-R Control R | Stompy G | Temur Tron URG
Mardu Infinite Priest WBR | 85-Card Dredge BRG | Elves GU | Boros Bully RW | Jeskai Familiars RWU
UB Wight Phantasm
RB Burn
UR Faerie Rites of Initiation
Legacy:
R Burn
CG-Post