Traverse Darkness (3/day). If Rylsarim is in shadows, he can fade into them becoming undetectable. On their next turn Rylsarim can reappear anywhere within his speed range.

Multiattack. Rylsarim makes two attacks in their turn.

Horse Kick. Melee Unarmed Attack: +14 to hit, reach 5ft., one target.
Hit: 13 (2d10+3) Bludgeoning Damage plus 6 (2d6) Necrotic damage

Longsword. Melee Weapon Attack: +14 to hit, reach 5ft., one target.
Hit: 16 (2d12+4)

Lance Charge. Melee Weapon Attack: +12 to hit, reach., one target.
Rylsarim must travel in a straight line for 20ft to use this, it can not be used over difficult terrain.
Hit: 35 (4d10+15)

Lifeforce Drain (Recharge 5-6, end of cast). Rylsarim calls to the sprits and casts a vale around themselves up to 10ft around themselves. All creatures in this zone at the start of the cast and at the start of Rylsarim turn for 2 turns, must roll a DC 18 Wis Saving throw, taking 20 (10d4) necrotic damage on a failed save or half as much damage on a successful one. Rylsarim then heals for half this damage.

Enter the description for how bonus actions work for your monster here.

Magic Block. When a creature makes a magical attack against Rylsarim, they can react to absorb the magic into their shield. Rylsarim must make a DC 14 Wis saving throw, on a pass they block half the incoming magical damage and gain resistance to that magic damage type. On a failed save they take full damage but still gain the resistance to that magic type.

Legendary Resistance. Rylsarim takes half damage on all non-magical attacks.

Enter the description for how mythic actions work for your monster here.

Mythic Action Name (Costs # Actions). Enter the description for your mythic action.