When bound to the feet chakra, urskan greaves says
When you charge, if your melee attack hits, you deal an additional +1d4 points of damage per point of essentia you invest in your urskan greaves. (Magic of Incarnum 92)
To preface, one must be a level 5 totemist to bind a soulmeld to the feet chakra. Further, as this is extra damage dice, the damage from the urskan greaves isn't multiplied on a critical hit. Compare this to the heart of fire which, when bound to the totem chakra by a level 2 totemist, says that
Your natural weapons or unarmed strikes deal an additional 1d4 points of fire damage per point of essentia you invest in your heart of fire. (Magic of Incarnum 70)
While I know that the effect of the urskan greaves specifies the attack—singular—made when the meldshaper charges, is game balance upset by allowing the effects of urskan greaves to apply to all attacks made after a charge, such as by a charging totemist possessing the special ability pounce or who has the soulmeld sphinx claws bound to his arms chakra? As a relative newcomer to the ins and outs of meldshaping, I don't know how impressive this effect would be nor if the consensus is that the singular is an oversight.
If game balance would be negatively affected, if a totemist both has urskan greaves bound to his feet chakra and has the ability to make multiple attacks when charging, can the totemist pick which of his melee attacks gains the extra damage from the urskan greaves? Can he pick after he knows the attack's result?
The campaign is a largely investigative one, combat occurring against level-appropriate foes maybe once per session. The party is deliberately all Tier 3 and 4 characters (a gnome beguiler; a halfling warlock; and 1 each of a human ardent, bard, shadowcaster, and totemist) and possess typical wealth for their levels. Characters are currently level 3, so this isn't an issue yet, but I like to be prepared. Game balance concerns should use this campaign as the benchmark, and, although unnecessary for a good answer, a discussion of the game balance effects of the above as it applies to a campaign with more frequent combat involving more typical PCs would be appreciated.