For the small toughness archetype.

I don't like the imbalanced mana cost. Keep in mind the multicolor limited uncommons are done to introduce people, especially newer players, to the environment of the set. Also 'all creatures'? I don't like doing cards that give a bonus to enemy creatures generally, especially not here. I'd also prefer we do toughness 3 or less as the main if not only only threshold for low toughness matters cards. Two is pretty restrictive in limited.

My suggested version

1RW

Creature

Haste

When ~ ETBs, creatures you control with toughness 3 or less gain first strike until end of turn.

3/1

Yep that sounds good. The toughness 3 or less does seem quite broad though. Most medium creatures fit into that. 2 is more restrictive but does make the color combination feel different than playing just and average limited deck.

Well, it's just a minor limited based theme. We don't want it to become a major theme or too close to it. I don't think we should be very concerned about making the theme feel unique. Having an element of caring about low toughness is already a unique enough axis for a archetype I reckon, without trying to push it to make sure it feels distinctly different.

Isn't this so far the only card that really cares about low toughness? Without that I doubt any playtester would know what 's theme even is besides aggro. Not that aggro is a bad theme, pretty standard for that combination.

Exactly, that's why I brought up the red-white theme in the set-wide discussion. The theme is not visible enough.

Slotted for editting/removal since red-white theme no longer cares about low toughness.