Castability of spells sometimes wonky

There's a few instances that I've noticed, where spells in hand are highlighted and clickable as castable, where in fact there's no way to cast them, and similarly the other way.

"castable" but uncastable;
3 lands in play, one of them Eldrazi Temple, 4 mv card in hand that's not an Eldrazi
Cavern of Souls in play, naming Eldrazi. Ancient Stirrings in hand highlighted

"uncastable" but castable
Ugin's Labirynth with an imprint underneath needs to be tapped for mana before the spells realise that there is 1 mana more available.

Start by reproducing the two reported scenarios in the game client: Eldrazi Temple with a non-Eldrazi four-mana card, and Cavern of Souls naming Eldrazi with Ancient Stirrings. Also test Ugin's Labyrinth before and after tapping it for mana. Done means castability indicators consistently match whether each spell can actually be cast.

Written by the indexing model from the issue text.