I know most people know what last will does. but for the few that dont here is the text.

So lets say I have 1 pyramid turtle. I play Last will and ram my turtle into their monster. So you get a monster with turtle and with last will you get turtle. can I attack with turtle again and special summon 2 more monsters? Does last will's effect last all the turn. If you still dont understand here is an example.

EX:
Player A: summons turtle and plays last will. he rams it to thier monster. With turtles effect he gets another turtle, then wil last wills effect he gets bone tower. after that he rams his new turtle into opponents monster. and with turtle he gets another turtle. and with last will he gets another bone tower. repeat....

so is that how it works? can you use last wills effect as many times during that turn you play it?

LAST WILL


You don’t select a monster as a target when you activate or resolve "Last Will". "Last Will" creates a state whereby, the next time during that turn when your monster is sent from your side of the field to your Graveyard, you may Special Summon 1 monster from your Deck using "Last Will’s" state. "Last Will’s" state then ends.

These states accumulate, so if you activate 2 "Last Wills", then the next time during that turn when your monster is sent from your side of the field to your Graveyard, you may Special Summon 2 monsters from your Deck, and the "Last Wills’" states then end.

You only Special Summon 1 monster for each 1 "Last Will".

The state will expire at the end of the turn, or when it is used, whichever comes first. So if you Special Summon using "Last Will’s" state, then the state is gone, and if the end of the turn arrives without using "Last Will’s" state, then the state is gone.

Fresh off the official faq.

You can only use the effect of Last Will at a max of once per turn. So if you have one of your monsters sent to the Graveyard, you can Special Summon 1 monster. If you have 1 more sent to the Graveyard, you cannot Special Summon any monsters by the effect of Last Will because its effect has been used up.

Also, Last Will is currently errated:
Last Will
You can only use this card's effect once, and only during this turn. When a monster on your side of the field is sent to your Graveyard, you can Special Summon 1 monster with an ATK of 1500 points or less from your Deck. Then shuffle your Deck.

The errata is refering to the fact that you can only use one special summon per last will (that effect will be used just once, the effect of other last will it's going to be treated as another effect).... you get it... my english is poor

Last will
• You don't select a monster as a target when you activate or resolve "Last Will". "Last Will" creates a state whereby, the next time during that turn when your monster is sent from your side of the field to your Graveyard, you may Special Summon 1 monster from your Deck using "Last Will's" state. "Last Will's" state then ends.

•These states accumulate, so if you activate 2 "Last Wills", then the next time during that turn when your monster is sent from your side of the field to your Graveyard, you may Special Summon 2 monsters from your Deck, and the "Last Wills'" states then end.

• You only Special Summon 1 monster for each 1 "Last Will".