I have four dares,anyone is free to take them with the exception of Arch for the reason I listed previously. I may have to double post sorry in advance.
1) an A team parody. Kiritsugu, Archer, Shirou and Satoshi (my OC) get hired to do the A team thing. What that is exactly is up to the author.
2) Shirou and Satoshi enter the moon cell and meet up with extra Archer. This is Lemon plain and simple but I have rules and such. Firstly. Archer X Hakuno(the female mc from extra) Archer can also involve extra Rin in the sex but at least FemC must be involved. Secondly no Rani, Ronnie or Alice I hate the first one and the other two are creepy for obvious reasons. Thirdly no sharing, this means the guys don't get involved with the same woman as the other boys do. Finally Shirou and Satoshi need partners in this as well, they can get with any of the remaining female characters present in extra including npc but not Ryougi.
3) Shirou, Archer and Satoshi go to rescue three of the TM girls. Bad guy is up to the author but the boys have to win. As always avoid incest, no loli. Sex is optional for this fiction but if you do, don't leave any of the boys out of the fun. As always the boys are separate with the sex scenes, no sharing.
4) The TM cast plays a melty blood type fighting game including all the tm characters. All the characters watch the matches, make comments alongside the competitors. The rules are as follows, the characters may not pick themselves to use in the game, win or lose the following must occur. Kiritsugu versus kotomine, lancer versus Archer, Satoshi versus Gilgamesh, Shirou versus Shinji, Caster versus Rider. Anything else is up to you the author. It's action comedy