Alpha Yeti

The Alpha Yeti is a hostile mob added by Twilight Forest. It must be defeated to access the Snow Queen's palace. It is immune to bows. It can throw ice blocks that can slow players down. After a couple of hits the Yeti will to flail about, knocking all players within range back and damaging them and create Falling Ice blocks that will damage players standing underneath them.

In Minecraft 1.7.10, when the Alpha Yeti flails about it is vulnerable Bows. It is not known if this is a bug.