Wolf: Yet another way to knock enemies susceptible as being a bonus action. No included damage but you only have to attach with an attack to implement it, so your next attack could be with gain. Choosing between this or even the elk can be a personal preference. This article https://goliath-fighter03579.yomoblog.com/33950317/the-fact-about-tiefling-dungeons-and-dragons-that-no-one-is-suggesting