Best spells to burn Legendary Resistance?

Best spells to burn Legendary Resistance? It has to be something that the DM would rule is a thread to be willing to burn it but a low cost to you.  I think Command may be the best spell for this.  it is low level and if they do not use the resistance they will be losing thier turns.  What do you think?

P.S.  if they are a caster in a small area Spell fire storm is good as they will need to save vs the spell then again every round and each time they try to cast.

The thing with Command is that creatures with Legendary Resistances will have Legendary Actions as well, so they aren't losing as much of their total action economy as others.

Also, not sure why you think Fire Storm has an ongoing effect.

Quote from Deathmvp >>

Best spells to burn Legendary Resistance? 

Depends on monster, situation, and level. In particular:

• What saves is the monster good or bad at? A lot of creatures with legendary resistance also have quite high wisdom saves.
• Is the creature particularly vulnerable to some non-incapacitating condition? For example, immobilize effects against primarily melee creatures, or blinding effects against creatures that are particularly reliant on seeing their target, such as a beholder.
• Is a disable that is broken by damage (such as sleep) useful? It might be, if there are minions to mop up.
• To what degree is it important to conserve resources anyway?
• Are there minions to mop up? A spell like hideous laughter isn't great if everyone is going to pound on the target anyway, 

Quote from The_Ace_of_Rogues >>

The thing with Command is that creatures with Legendary Resistances will have Legendary Actions as well, so they aren't losing as much of their total action economy as others.

Also, not sure why you think Fire Storm has an ongoing effect.

They're thinking of Sleet Storm, which has an ongoing effect that's particularly hazardous for spellcasters.

Edit: I'm wrong, see below

 It was Spellfire storm. (Source: Forgotten Realms - Heroes of Faerun}.   It has become one of my favorite spell to shutdown caster.

I would argue Banishment since on average creatures tend not to have a high CHA save but obviously this is dependent. Command is 1st level but as said most creatures with legendary resistances will likely have a high wis save.

Ideally you want a spell with multiple saving throws.  If you have access to 9th, Prismatic Wall is good.  

Spells like Wall of Light or Illusory dragon that let you do a saving throw attack every round is also good.  The best ones give you one save when you cast the spell and another every bonus action, so you get two saves in the first round.

I also like the trap spells that do damage every round you are in an area, like Jallarzi's Storm of Radiance.  With spells like that, you have your allies push people into the area.

Quote from Mog_Dracov >>

Ideally you want a spell with multiple saving throws.

 Most spells with multiple saves are also spells where you aren't going to spend legendary resistance to make a save.

Hypnotic Pattern

If they have a flight speed, Sapping Sting.