Cross-Section of White Arkhos Commons

I've been chugging along slowly working on Arkhos, mostly by myself at the moment, while other team members take a break. I thought I would show everyone what's been happening. This is all of the boring stuff, but the names of the last four give an indication of the heavy Ancient Greek/Roman theme going on here.

CARDNAME
Creature — Human Soldier
: ~ gains first strike until end of turn.
[3/1]

CARDNAME
Creature — Human
Reverb - ~ enters the battlefield with two +1/+1 counters on it if you've cast another spell this turn.
[0/1]

Sunspot Calf
Creature — Ox
Sacrifice ~: Target creature is indestructible this turn.
[1/3]

Alseid Nymph
Creature — Spirit
Whenever Alseid Nymph becomes the target of a spell or ability, you may sacrifice it. If you do, put a 1/2 white Spirit creature token onto the battlefield.
[1/2]

Aquilifer Charge
Instant
Until end of turn, target creature you control gets +2/+2 and other creatures you control get +1/+1. If you control a Human, draw a card.

Celestial Fulmination
Sorcery
Exile target creature. Tap up to two target creatures.

OX!

The Reverb 1-drop seems pretty good.

Possibly too good for a Common, really. Might bump it up to Uncommon in case it gets silly aggressive.