Idle Ninja - Summon Eudemons is a game that combines the elements of a role-playing game and a card game. It is a free card game that can be played offline.

It is the story of a ninja who travels to a distant land to explore and find the truth. To defeat more and more powerful enemies and Eudemons, he needs to improve his ninjutsu combat power.

To do that, he needs to meditate, practice alchemy, strengthen equipment, or assemble his Eudemons squad and advance them.