Splinter, Lord of Rats

First Strike, Deathtouch
Other Rat creatures you control have First Strike and Deathtouch
At end of turn, if you dealt combat damage to a player with a Rat creature, get an experience counter. Other Rats you control get +1/+1 for each experience counter you have.
{3}{b}{t}: Sacrifice a creature. Create a number of 1/1 rat tokens equal to the sacrificed creatures toughness.