There is a Legacy version
here.
Lead the Pack Feat 16Uncommon Archetype Source Player Core 2 pg. 189Archetypes Beastmaster,
Undead MasterPrerequisites Mature Beastmaster Companion; you have multiple animal companions
You can have up to two animal companions active at once. However, when you do, it’s slightly more difficult to Command them. If you don’t Command either of your companions, one of the two (your choice) can still use 1 action on your turn to
Stride or
Strike, per
Mature Beastmaster Companion, but not both. When you Command an Animal, either choose one of the companions to take 2 actions, as normal, or else each companion can take 1 action to Stride or Strike. Either way, you can’t Command an Animal to make either companion act again until your next turn
Lead the Pack Leads To...
Pack TakedownTraits
Archetype: This feat belongs to an archetype.
Uncommon: Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.