If I have Vanquisher's Banner and The Immortal Sun on the battlefield, and a 1/1 creature enters the battlefield under my control, assuming the creature matches the creature type I declared with Vanquisher's Banner, would I be able to pay 2 mana and use Mentor of the Meek to draw an additional card?
4Possible duplicate of Bludgeon Brawl & Puresteel Paladin, question appears different, but the answers, answer this question as well.– JohnMar 9, 2018 at 16:05
1I'd rather keep it open as this is a more legible question for the general case.– doppelgreenerMar 9, 2018 at 16:49
1Where is the 2 mana coming from?– AcccumulationMar 9, 2018 at 19:27
@Acccumulation Would it affect the answer? I think we can assume that the player has enough mana, and that there are no spending restrictions.– RainboltMar 9, 2018 at 21:29
@John no it's a different enough case that I would call it different.– AndrewMar 12, 2018 at 14:43
Both abilities of Vanquisher's Banner and The Immortal Sun that gives creatures you control +1/+1 are static abilities.
611.3. A continuous effect may be generated by the static ability of an object.
611.3a A continuous effect generated by a static ability isn’t “locked in”; it applies at any given moment to whatever its text indicates.
611.3b The effect applies at all times that the permanent generating it is on the battlefield or the object generating it is in the appropriate zone. Example: A permanent with the static ability “All white creatures get +1/+1” generates an effect that continuously gives +1/+1 to each white creature on the battlefield. If a creature becomes white, it gets this bonus; a creature that stops being white loses it.
But what comes first when the 1/1 creature enters the battlefield zone. The trigger from Mentor of the Meek or the static abilities?
611.3c Continuous effects that modify characteristics of permanents do so simultaneously with the permanent entering the battlefield. They don’t wait until the permanent is on the battlefield and then change it. Because such effects apply as the permanent enters the battlefield, they are applied before determining whether the permanent will cause an ability to trigger when it enters the battlefield. Example: A permanent with the static ability “All white creatures get +1/+1” is on the battlefield. A creature spell that would normally create a 1/1 white creature instead creates a 2/2 white creature. The creature doesn’t enter the battlefield as 1/1 and then change to 2/2.
The 1/1 creature enters the battlefield as a 3/3, given that it's the type needed for Vanquisher's Banner. So Mentor of the Meek won't trigger.