Animate Plant

You reach out and grant movement to a medium sized plant. This plant uses the plant stat block.The plant de-animates at the end of the duration of the spell or when concentration is lost, and is destroyed if it falls to 0 hit points.

The plant animated this way is an ally to you and your companions. During combat the plant shares your initiative and understands and follows your commands (no action required). If you do not issue any, the plant takes the hide action and does not move.

At higher levels: For every spell level above 1st the stat block is updated. For every 3 spell levels higher than 1st the size of the plant you can animate goes up by one (at 4th level the plant can be large, at 7th level the size can be huge). 

Animated Plant

Armor Class: 8 + spell level (natural armor)

Hit Points: 20 + 5 for each spell above 1st

Speed: 20ft

Strength                                                 Dexterity                    Constitution                      Intellegence                   Wisdom               Charisma

16+2 for each size above medium (+3) 6 (-2)                         16(+3)                                 4(-3)                             10(+0)                  10(+0)

Damage vulerabilities: Fire, Cold, Poison, Necrotic

Damage resistances: piercing, bludgeoning

condition immunities: blinded, deafened, exhaustion, frightened, pone, stunned, unconscious

Senses: Blindsight 20ft passive perception 10

Languages: understands languages you speak

Challenge-- Proficiency Bonus: equals your proficiency bonus

Actions

constrict: the plant can attempt to grapple a creature its size or smaller. If the creature fails a Strength or Dexterity check (it's choice) using your spell save DC) the creature is grappled and restrained. On subsequent turns it use it's action to make a strength check to break free. Attack rolls can be used to cut the vines, the vines have the same AC as the animated plant but 5hp (+5 for every 2 spell levels above 1st)

vine reach: The plant has advantage crossing any distance equal to it's reach and can add it's constitution and strength bonus when helping others cross the same distance (a medium sized plant has 10ft reach, large has 15ft, and huge has 20ft). These vines magically grow back at the start of the animated plant's turn if cut

multiattack: The plant makes a number of attacks equal to half the spell's level rounded down

lash. melee weapon attack: your spell modifier to hit, reach 10ft (+5ft for each size above medium), one target. Hit: 1d6+3+the spell's level slashing damage