Tooth and Claw | One with the Kami

Cards

First Day of Class in hand.
Tooth and Claw and
One with the Kami on the battlefield (
One with the Kami attached to any creature you control).

You control two additional creatures excluding the creature that has
One with the Kami attached to it, at least one of which must be modified.

Cast
First Day of Class by paying ({1} magic symbol) ({R} magic symbol) .
Activate
Tooth and Claw by sacrificing two other creatures.
When the creatures die,
One with the Kami triggers for each modified creature that died this way, creating a number of 1/1 Spirit creature tokens.
When the Spirit token(s) enter,
First Day of Class triggers that many times, putting a +1/+1 counter on each Spirit.
Resolve the
Tooth and Claw ability, creating a 3/1 Carnivore creature token.
When the Carnivore token enters,
First Day of Class triggers, putting a +1/+1 counter on the Carnivore token.
Repeat from step 2.

This combo has been estimated to be Exhibition (Bracket 1+).