Backs to the Wall

Edison Card Text
Pay Life Points so that you only have 100 left. Special Summon as many "Six Samurai" monsters from your Graveyard as possible. You cannot Special Summon more than 1 monster with the same name, or a monster that has the same name as a monster you already control.
Force of the Breaker • 2007-05-16
No targeting
No Damage Step effect
Banlist • Unlimited
Interactions
Can you activate Backs to the Wall if you have no Six Samurai in the Graveyard?!
A player wants to activate Backs to the Wall without any valid targets.
No. You cannot activate it if it would do nothing.
If Backs to the Wall is activated and the opponent chains D.D. Crow to remove a Samurai, do you still pay to 100 LP?!
Backs to the Wall is activated and a Six Samurai is removed before resolution.
Yes. You still pay down to 100 LP. On resolution, you Summon any remaining Six Samurai in the Graveyard; if none remain, it resolves without effect.
Rulings
edisonformat.net
Pay Life Points so that you only have 100 left. Special Summon as many Six Samurai monsters from your GY as possible. You can't Special Summon more than 1 monster with the same name, or a monster that has the same name as a monster on the field.
●You can't activate this card if your Life Points are exactly 100 or less than 100.
●You can't activate this card if there are no “Six Samurai” monsters in your GY.
edisonformat.com
Pay Life Points so that you only have 100 left. Special Summon as many "Six Samurai" monsters from your Graveyard as possible. You cannot Special Summon more than 1 monster with the same name, or a monster that has the same name as a monster on the field.
You cannot activate this card if your Life Points are exactly 100 or less than 100.
You cannot activate this card if there are no “Six Samurai” monsters in your Graveyard.