Archaebacteria, The Duplicator

Haste, Double Strike, Vigilance
When Archaebacteria, The Duplicator enters the battlefield create {x} 1/1 Archaebacteria tokens
with Double Strike and "When Archaebacteria
dies create 2 1/1 Archaebacteria tokens that are
copies of this card."
They were the first living things to ever exist, and they will probably be the last.