Cressentia, The Blighted Druid

Inate Spellcasting. Cressentia can cast the following spells, requiring no material components. Wisdom is her spellcasting ability (spell save DC 14 +6  to hit with spell attacks)

at will: druidcraft, thorn-whip (5th- Level)

3/day each: plant growth, spike growth

Legendary Resistance (3/day). If Cressentia fails a saving throw, she can choose to succeed instead.

Magic Resistance. Cressentia has advantage on saving throws against spells and other magical effects.

Spell Sniper. The range of Cressentia's spell attack is doubled (included below) and she ignores half and three-quarters cover when making these attacks.

Traverse Terrain. Cressentia cannot have her movement reduced by plants (both magical and nonmagical), and she is immune to any damage they would deal. 

Thorn Whip. Melee Spell Attack: +6 to hit, reach 60ft., one target. Hit: 7 (2d6) piercing damage, and if the target is large or smaller, the target is pulled 10 feet closer.

Cressentia can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creatures turn. Cressentia regains spent legendary actions at the start of their turn. 

Cantrip (Costs 1 Action). Cressentia casts thorn whip.

Move. (Costs 1 Action) Cressentia moves up to her speed without provoking opportunity attacks

Cast A Spell. (Costs 2 Actions) Cressentia casts plant growth or spike growth, assuming the spell has at least one use left.