I have Yarok, the Desecrated on the battlefield:
If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
I play Thought Sponge, after my opponent drew three cards this turn:
Thought Sponge enters the battlefield with a number of +1/+1 counters on it equal to the greatest number of cards an opponent has drawn this turn.
Does this creature's triggered ability trigger an additional time? Is it entering as a 4/4, or as a 7/7?
I'm not sure whether this effect counts as replacement effect, as mentioned in the rulings of Yarok:
7/12/2019. Replacement effects are unaffected by Yarok’s ability. For example, a creature that enters the battlefield with one +1/+1 counter on it won’t receive an additional +1/+1 counter.