practice raids

Well lets say you unlock a new troop or just want to improve your raiding sninjas. Well supercell. Should add practice raid option for every townhall (5-10) custom bases to raid when you get a three stars you advance to another custom map like tier 1 tier 2 and you get to keep your troops afterwards resources don't count. Who wants to lose trophies on raid accidents. -ninjafreshwinnerninjai