First strike appears primarily in white and red, and occasionally in black.

Mm. the last time green had a first striker was with Glissa Sunseeker.... unless you count time-shifted Spitting Slug. Either way, it's been over ten years.

very well, ideas to change it?

Any other ability? I mean, what slot is this card trying to fill? A small green French vanilla could probably get reach.

I'm certain I use terms like "maybe", "probably", "likely" and such a lot, but damn. "A small green French vanilla could probably get reach"? Seriously? Like there wasn't a zillion such cards already, lol.

­Grappler Spider sucks though. Thornweald Archer maybe? With all the power creeping going aroung a 2/2 reach for isn't out of question either at common (ie. Spinneret Sliver & Noose Constrictor).

Trample, Hexproof, and Flash are all possibilities as well. In each of those cases, I'm sure we can up to a 2/2.

If you're looking for something a bit more combat oriented, like first strike, then "When ~ attacks, it gets +0/+3 until end of turn" can be nice (or switch to 'when ~ blocks' if you wanted something more defensive, but be careful not to make a super-blocker. Limited has problems with those.) The Rootwalla ability always works in green... I'd probably make it give +2/+2 for with a 2/1.

I'd avoid regeneration or indestructible in common, unless the creature was intentionally inefficient (and whatever you're thinking of, probably one or two steps worse than that.) Using a limited resource to get it can be nice (discard a creature, or sacrifice a land) but that doesn't make sense on a small creature... it might be worth the trade, but it feels horrible. You're using -1/-1 counters, though. A 2/2 creature that regenerates for and a -1/-1 counter should be reasonable.

I guess I will give it Flash ;D

Well, this card sure evolved a lot. An inverted sirens call? Hmmm.

Red sure as heck gets this ability. White has had it, like, once. Pushing to green, with a maximum power limitation? Maybe?

Green gets the inverse though; "target creature must block", and provoke. So feels odd to get this too.

The ability itself seems non-problematic (even weak) and flavourwise could be justified as green (supermenace - I'm big and stompy, small things hide when I'm around) but mechanically, it looks like it's not in greens bailiwick.

But Green already gets this ability. See also Ghirapur Guide, Mournwillow or Arlinn's Wolf. They operate in a slightly different way, but it's the same concept.

It's the inverse of the concept. One is "Little things can't block me". The other is "You can't block anything". Sure't they act pretty similarly on a small field; but they're different like "Cannot block" and "Must attack" are different.

[Comment deleted by myself due to irrelevance.]

Good points, i will do the normal non-inverse. it fits the part anyway