Sporeweb Weaver - Triggers off Player Damage [Fixed]

Sporeweb Weaver
When this creature is dealt damage for the first time each turn: Gain X life.
Then create X Saproling Tokens.
X is the total amount of damage dealt to the creature.

If I take damage on my turn the Sporeweb Weaver triggers (i gain life and create saprolings)
Examples
with Greven, Predator Captain, with the Sporeweb in play and another creature. use Greven's combat sac a creature.
with Treacherous Blessing, play a spell, take 10 dmg, gain 10 life, put 10 saprolings into play.