Rot farm skeleton is experimental. Likely to be replaced by grisly salvage.

Firebolt - prefer the cost and the flashback to the damage of incinerate.
Oko - too strong. Shardless agent replaces it as a human. Likely to give simic another gold card.
Atris - adds fun minigames.
Path to exile and swords to plowshares seem too efficient. Replacing with slightly more expensive instant-speed removal.
Fumigate - again making white removal a bit more expensive.
Loam lion - domain zoo lol.
Temporal trespass - flavour improvement for the graveyard-based strategies in blue.
Blade historian supports RW humans.
Thrun isn't very fun.
Saheeli the gifted doesn't seem very good in this cube.
Baleful strix should already be here. But glint-sleeve siphoner may not be the correct cut.
Titania supports lands matter.
The morph package was expanded in order to introduce some complexity to combat. May expand further.
Might of alara is a flavourful combat trick.
Chandra, acolyte of flame is a support piece for an old archetype.
Killing kiki-jiki combo.