Cassian Morello, the Cartographer

Silver Servant (1/ day). When Cassian fails a saving throw, he can reroll it and add +5 to the roll.

Spellcasting. Cassian is an 8th-level spellcaster. Its spellcasting ability is [Intelligence] (spell save DC 16, +8 to hit with spell attacks). Cassian has following spells prepared:
Cantrips (at will): [Fire Bolt], [Elementalism]
1st level (4 slots): [Shield], [Mage Armor], [Magic Missle]

2nd level (4 slots): [Misty Step], [Flame Blade], [Rime's Binding Ice]
3rd level (3 slots): [Fireball], [Counterspell], [Hypnotic Pattern], [Slow]

4th level (3 slots): [Banishment], [Fire Shield]

5th level (2 slots): [Bigby's Hand], [Cone of Cold]

Animate Maps. (Recharge 6) Cassian animates up to 8 maps that will fly around. These maps are treated as allied creatures and take their turn after Cassian.
An Animated Map has 16 AC, 30 ft flying speed, 3 hp, and can take the Fly-by Cut action: Melee Attack Roll: +8 to hit, reach 5 ft. Hit: Force damage equal to 1d4 + 8. 
For the rest, an Animated Map uses the stats 10 | 18 | 10 | 3 | 3 | 1 .

Shortsword. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 7 (1d6 + 4) Slashing damage.

The Map of Here: Marked Pathway. Cassian chooses a creature within 60 ft and traces a path through the map with his finger. The creature does not take opportunity attacks on their next turn and can move through difficult terrain without a movement speed penalty.

The Map of Here: Red Line. When a creature Cassia can see within 60 ft moves up to 10 ft, he draws a red line on the map. The creature must make a DC 16 Con save. If it fails, its remaining movement is immediately depleted.