Ryaj, Creator of Life

Ryaj enters the battlefield with a -1/-1 counter
for each 2 life paid to cast it.
When Ryaj enters the battlefield, choose a
creature type that is not "dragon", "elf",
"zombie", "vampire", "human", or "goblin".
Whenever a non-token creature of the chosen
type enters the battlefield, you gain 1 life, draw a
card then discard a card, and create a 0/1 green
plant creature token.