Great Fiend – Luxuria
***/Dark/Fiend/effect/1400atk/1000def
Once per turn during your main phase, you can select one monster your opponent controls and equip it to this monster. As long as this monster is equipped with a monster, it gains 1000atk. Pay 1000 life point during your opponent's standby phase or destroy all cards equipped to this card. There can only be 1 Great Fiend - Luxuria face up on the field.

Great Fiend - Gula
****/Dark/Fiend/effect/1800atk/1000def
During your standby phase you can pay life points in multiples of 500(max. 1000) to remove the top card of your opponent's deck from play for every 500 life points paid. If you paid no life points for this card's effect, remove the top 2 cards of your deck from play. There can only be 1 Great Fiend - Gula face up on the field.

Great Fiend - Avaritia
***/Dark/Fiend/effect/1000atk/1800def
During your standby phase you can pay life points in multiples of 500(max. 1000) to draw 1 card for every 500 life points paid. If you paid no life points for this card's effect, Your opponent may draw up to 2 cards. There can only be 1 Great Fiend - Avaritia face up on the field.

Great Fiend - Acedia
***/Dark/Fiend/effect/500atk/2000def
You may pay 1000 life points during your opponent's standby phase. If you do, your opponent must set all their spell cards and cannot activate them until their next turn. If you do not pay, you must set all your spell cards and cannot activate them until your next turn. There can only be 1 Great Fiend - Acedia face up on the field.

Great Fiend - Ira
****/Dark/Fiend/effect/2000atk/0def
During your standby phase, you may destroy one monster your opponent controls. If you do not, inflict damage to your life points equal to the original attack of this card and this card cannot attack. There can only be 1 Great Fiend - Ira face up on the field.

Great Fiend – Invidia
****/Dark/Fiend/effect/1500atk/1500def
Once per turn, you can select 1 face-up monster your opponent controls. While you control this face-up card, this card's name is treated as the selected monster's name, and it gets the selected monster's effect(s). Pay 1000 life points during your opponent's standby phase or negate this card's effect until your next end phase. There can only be 1 Great Fiend - Invidia face up on the field.

Great Fiend - Superbia
***/Dark/Fiend/effect/500atk/500def
The ATK and DEF of this card are each 100 points higher than the highest ATK on the field. Negate this effect unless you pay 1000 life points during your opponent's standby phase. There can only be 1 Great Fiend - Superbia face up on the field.

Had nothing better to do. Based on the 7 deadly sins. They were all supposed to have some big draw back for not paying the lp costs but some just seemed better off only having their effects negated.