Testing out some on-board effects.

Hard to evaluate whether these cards would be balanced or simply too powerful.

Is Raging River a fun inclusion?
Mana Crypt broken, or actually terrible?
Is it better to have Drop of Honey in green or have the effect in white with Porphyry Nodes?

Taking on board some suggestions.

Balancing out some of the colours.
Infiltrator il-Kor proved to be too slow.
Spider Umbra was cut to give flying greater relevance, but may be re-added if flying becomes too easy of a win.

Adding some white creatures.

Added some hybrid cards.

Filling out the blue section.

Removed underwhelming cards.
Trying out variants on Shivan Fire.
Trying out Snakeskin Veil as alternative to Stony Strength. Might be too powerful though.
Testing out unusual high-risk, high-reward creatures in Old-Growth Dryads, Hungry Lynx and Tempting Wurm.

Cards removed for lack of power.

Initial playtesting list.