Time Restoration. At the begining of his turn he goes back to how it was at the start of the last creature in initiatives turn.

Innate Spellcasting.  His spellcasting ability is [int] (spell save DC 16, +8 to hit with spell attacks). 
at will: [Hold person], [Ray of Frost], [Gift of Alacrity], [Message], [Disguise Self]            3/day: [Misty Step], [blur], [haste], [Temporal Shunt], [Counter Spell]

Temporal Awareness. Adds his int mod to initiative rolls.

Time jump. As an action he can change his location to a spot he can see within 300ft that he has been to in the past 8 hours.

Hourglass Attack. Hourglass Attack: +8 to hit, reach 5 ft., 1 target. Hit: 10 (d8 + 5) [Slashing] damage. When a creature gets hit by Hourglass they must make a DC 16 Wisdom save. On a fail they gain the effects of the slow spell, on a success nothing happens.

Time killer Attack. TimeKiller Attack: +8 to hit, reach 5 ft., 1 target. Hit: 8 (d4 + 5) Piercing] damage. When a creature gets hit by Hourglass they must make a DC 16 constitution save. On a fail they age at 1.5 times their current rate, on a success nothing happens.

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

Spell Catch. When an enemy cast a spell he can use his reaction to slow it down turning it into a bead. When a creature crushes one of these beads they cast the spell contained within it. He can make up to 4 beads a day. 

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

Legendary Action Name (Costs # Actions). Enter the description for your legendary action.

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

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