Sentaiman

Sentaiman monsters are monsters loosly based on sentai shows (like, for example, the entier "Power Ranger" franchise). Most Sentaiman monsters are low level Warrior-Type monsters who are able to be Tribute to Special Summon special Machine-Type monsters called "Sentaiman Robo" when your oponent summons a high level monster. Then, thay can 'merge' together much in the same way as the infamous. Only, when destroyed, Sentaiman Robo monsters Special Summon Sentaiman monsters from your Graveyard to start again.