Neverheard Scientist

When this creature attacks other rats you control
may gain infect.
{b}, {t}, Sacrifice two rats: Choose one - Gain
control of target creature; Create a token that is a
copy of this creature; You gain hexproof until
end of turn; or sacrifice two rats and target player
loses 12 life and you gain 12 life.
{ut}, Sacrifice a creature: You lose 12 life and
target player gains 12 life.