"In these halls there is no pass or fail. Your true test comes with the first full moon."

Mentor of the Meek

Whenever another creature you control with power 2 or less enters, you may pay {1}. If you do, draw a card.

Innistrad Remastered

Pioneer Masters

Foundations

"Considering your statures, let's start with the upward slash."

Foundations Jumpstart

If one or more static abilities that apply to a creature entering change its power, those abilities are considered when determining whether Mentor of the Meek's ability triggers. The same is true for replacement effects that apply to it, such as entering with one or more +1/+1 counters or entering as a copy of another creature.

Mentor of the Meek's ability checks the power of the other creature only as it enters. If that creature's power is 2 or less, the ability will trigger. Once the ability triggers, raising that creature's power above 2 won't affect that ability. Similarly, reducing the creature's power to 2 or less after it enters won't cause the ability to trigger.

While resolving the triggered ability of Mentor of the Meek, you can't pay {1} multiple times to draw more than one card.