Indomitable (3/Day). The warlord can reroll a saving throw it fails. It must use the new roll.   Survivor. The warlord regains 10 hit points at the start of its turn if it has at least 1 hit point but fewer hit points than half its hit point maximum.   Earth Walk. You can move across difficult terrain made of earth or stone without expending extra movement.   Merge with Stone. You know the Blade Ward cantrip. You can cast it as normal, and you can also cast it as a bonus action a number of times equal to your proficiency bonus, regaining all expended uses when you finish a long rest. You can cast the Pass Without Trace spell with this trait, without requiring a material component. Once you cast that spell with this trait, you can’t do so again until you finish a long rest. Constitution is your spellcasting ability for this spell.   Trampling Charge. If the mammoth moves at least 20 ft. straight toward a creature and then hits it with a gore attack on the same turn, that target must succeed on a DC 18 Strength saving throw or be knocked prone. If the target is prone, the mammoth can make one stomp attack against it as a bonus action.   Shapechanger. The werebear can use its action to polymorph into a hybrid form or into a mammoth form, or back into its true form, which is humanoid. It's hitpoints are maintained between forms. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.