Symmetry Matrix
Artifact
Whenever a creature you control with power equal to its toughness enters, you may pay 
. If you do, draw a card.
"Achieving perfection is simple. Watch, I'll do it twice." —Mishra
Slawomir Maniak
The Brothers' War (BRO)
• #252Rulings
If one or more static abilities that apply to a creature entering the battlefield change its power or toughness, those abilities are considered when determining whether or not Symmetry Matrix's ability triggers. The same is true for replacement effects that apply to it, such as entering the battlefield with one or more +1/+1 counters or entering the battlefield as a copy of another creature.
(wotc • 2022-10-14)
Rulings
If one or more static abilities that apply to a creature entering the battlefield change its power or toughness, those abilities are considered when determining whether or not Symmetry Matrix's ability triggers. The same is true for replacement effects that apply to it, such as entering the battlefield with one or more +1/+1 counters or entering the battlefield as a copy of another creature.
(wotc • 2022-10-14)