Lapis Lazuli’s burn is 500, and for those who can’t remember the effect:

Gem-Knight Lady Lapis Lazuli
Earth Rock / Fusion / Effect
LV5 2400/1000
“Gem-Knight Lapis” + 1 “Gem-Knight” monster
Must first be Fusion Summoned by using the above cards as Fusion Material. You can only Special Summon 1 “Gem-Knight Lady Lapis Lazuli” per turn. (1) Once per turn: You can send 1 “Gem-Knight” monster from your Main Deck or Extra Deck to the Graveyard, and if you do, inflict 500 damage to your opponent for each Special Summoned monster on the field.

Gem-Knight Lapis
Earth Rock
LV3 1200/100
A kind warrior who is very concerned for the well-being of her comrades. She’s very good friends with Lazuli.

Source: Maxut