Fishing for Jormungandr

(As this Saga enters and after your draw step, add
a lore counter. Sacrifice after III.)
I. Create three 2/2 green Beast creature tokens
with "Sacrifice this creature: Add {g} to your
mana pool".
II. Create a 4/4 red and green Beast creature
token with"Sacrifice this creature: Gain 7 life".
III. Create two 3/3 Whale creature tokens
with "Sacrifice this creature: Counter target
activated ability that isn't a mana ability".