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, Captain Kathryn Janeway triggers that many times, revealing the top card of your library, putting the card back on top of your library, and then 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, Captain Kathryn Janeway triggers, revealing the top card of your library, putting the card back on top of your library, and then putting a +1/+1 counter on the Carnivore token
Repeat.
This clever loop turns your sacrifices into an ever-growing swarm of tokens by feeding off Captain Kathryn Janeway's persistent exploring. When you use Tooth and Claw to sacrifice your creatures, One with the Kami sees them die as modified entities—pumped up by previous +1/+1 counters—and floods the board with Spirit tokens in return. The entry of these Spirits, alongside the resulting Carnivore tokens, triggers Captain Kathryn Janeway to stack your library's top card and place fresh +1/+1 counters on them, ensuring every new token is fully modified to feed the Tooth and Claw sacrifice engine all over again.