Armor Class: 14 (with mage armor)
Hit Points: 18 (4d6 +4)
Speed: 30ft (9m / 6 sqr)
Ability Modifiers: -2 Str, +2 Dex
Small Size: small creatures should use d6 for hit dices
Stealthy: You have proficiency in the stealth skill. (even if DMG didn't say so, all the goblins on MM got stealth)
Nimble Escape: The creature can take the Disengage or Hide action as a bonus action on each of its turns .
Darkvision: 60ft (18m / 12sqr)
Languages: speaks Common and Goblin.
Quarterstaff. Melee Weapon Attack +0 to hit, reach 5 ft, one target. Hit: 1 (1d6 -2 ) bludgeoning damage.
Properties: Versatile (1d8),
Spellcasting. the Evoker is an 4th-level wizard. Its spellcasting ability is Intelligence (spell save DC 12, to hit with spell attacks +4)
Cantrips (at will): Mage Hand, Acid Splash, Ray of Frost, Dancing Lights,
1st level (4 slots): Magic Missile, Burning Hands, Feather Fall, Mage Armor,
2nd level (3 slots): Scorching Ray, Web, Cloud of Daggers, Melf's Acid Arrow,