Frostline

Pets

Beasts you capture and raise at the Beast Cage. Each has an active skill you trigger when it helps most.

TL;DR Level pets in the order the game unlocks them, fire the right skill before the right moment (Hyena before construction, Lion and Tiger before fights), and save Wild Marks for SvS.

Unlocks
Furnace 18, around server day 55
Building
Beast Cage
New pets
Every few months of server age
Skills stack
Yes (official help center)

When pets arrive

~Server dayPets
55 (Furnace 18)Cave Hyena, Arctic Wolf, Musk Ox
90Giant Tapir, Titan Roc
140Giant Elk, Snow Leopard
200Cave Lion, Snow Ape
280Iron Rhino, Saber-tooth Tiger
370Mammoth
LaterFrost Gorilla, Frostscale Chameleon

Per a community server timeline. You also need the previous pet in the chain at a set level (Lv.15 or Lv.30) before the next can be captured.

Active skills

PetSkill effect
Cave HyenaConstruction speed +5–15% (5 minutes)
Arctic WolfRestores Chief Stamina
Musk OxSpeeds up gathering (instantly finishes a resource tile)
Giant TapirFinds pet food
Titan RocReduces enemy troop health
Giant ElkFinds items, including Charm Designs
Snow LeopardFaster marches, lower enemy lethality
Cave LionTroop attack +2.5–10% (2 hours)
Snow ApeDeployment capacity +3,000–15,000 (2 hours)
Iron RhinoRally capacity boost (2 hours)
Saber-tooth TigerTroop lethality up to +10% (2 hours)
MammothTroop defense up to +10% (2 hours)

From community guides; effects scale with pet level and the numbers may change with updates. Different pet skills can be active at the same time.

Leveling & refinement

  • Level pets with pet food. Every 10 levels a pet needs an advancement, which costs extra materials: Taming Manuals from Lv.10, Energizing Potions from Lv.30 and Strengthening Serums from Lv.50.
  • Higher-rarity pets have higher level caps, up to Lv.100 for the top pets (per one wiki).
  • Refinement uses Common or Advanced Wild Marks to roll extra stats. A roll can come out worse, so keep the old stats if it does.
  • One wiki lists pet adventures at 10 Chief Stamina and 4 hours each, for random rewards.

When to fire which skill

  • Cave Hyena right before starting a big build, especially on SvS City Construction day.
  • Musk Ox on gathering-scoring days.
  • Cave Lion, Saber-tooth Tiger and Mammoth right before a rally, garrison fight or Bear Hunt.
  • Snow Ape and Iron Rhino for rally leaders who want bigger marches.
  • On SvS Beast Slay and Power Boost days, Wild Marks and pet advancements score well (an Advanced Wild Mark is worth 15,000 points), so save them.