Shadowtouched Spiretop Drake

The following example is not a direct application of the shadowtouched alternate advancement. I made an existing ability (flyby attack) synergize better with necrotic smite, and removed another melee basic attack (snatch) to compensate. Doing so also simplified the available combat options slightly.

Shadowtouched Spiretop Drake, Level 2 Skirmisher
Small natural beast (reptile) (XP 125)

Initiative +7
Senses Perception +4; darkvision
HP 37; Bloodied 18; see also bloodied retaliation
AC 17; Fortitude 11, Reflex 15, Will 14
Resist 5 necrotic
Speed 4, fly 8 (hover); see also flyby attack

Bite (standard; at-will)
+6 vs. AC; 1d6 + 4 damage; see also bloodied retaliation.
Flyby Attack (standard; at-will)
The shadowtouched spiretop drake flies up to 8 squares and makes a bite attack or a necrotic smite attack at any point during that movement. It does not provoke opportunity attacks when moving away from the target of the attack.
Necrotic Smite (standard; encounter) * Necrotic
The shadowtouched spiretop drake makes a bite attack. If it hits, it deals an additional 6 necrotic damage and the target is weakened (save ends).
Bloodied Retaliation
The shadowtouched spiretop drake gains a +2 bonus to attack rolls against the creature that first bloodies it in an encounter.

Alignment Unaligned
Languages –
Str 11 (+1) Dex 18 (+5) Wis 16 (+4)
Con 13 (+2) Int 3 (-3) Cha 11 (+1)