Final answer:
Obtaining a Tier 2 Scholar Crest grants a Scholar Emblem, providing a bonus to ability power for Scholar units and a Heimerdinger. The update on 12/8/21 did not change its effect.
Step-by-step explanation:
The effect of obtaining a Scholar Crest at Tier 2 is that it grants a Scholar Emblem, which provides a bonus to ability power to Scholar units within the context of a strategy game. The date mentioned, 12/8/21, seems to be referring to an update, perhaps to the game mechanics or to the items, such as the Scholar Crest. However, based on the information provided, the effect of obtaining a Scholar Crest at Tier 2 does not appear to have changed on 12/8/21. It still grants a Scholar Emblem and provides a Heimerdinger without mention of offering a different champion or a different effect.