Garvantua, serpent colossus

Haste, deathtouch, trample, reach, lifelink.
At the beginning of your upkeep, create a
waste token with; "sacrifice this card; add
two mana of any color to your mana pool .
{1}{u/b}{u/b}; create a 2/1 serpent token
with deathtouch. Add {c}{c}{c} to your mana pool.
{c}; target opponent loses 2 life.
Whenever you lose life, create that many 2/1
serpent tokens with deathtouch.
"Goodbye."