Ghave, The Siphoning Seer

When Ghave, The Siphoning Seer enters the
battlefield, create X 1/1 green Saproling creature
tokens where X is the amount of mana spent to
cast it.
{1}, Pay 1 life: Create a 1/1 green Saproling
creature token.
{1}, Sacrifice a Saproling: Draw cards equal to
the number of Saprolings you control.