You can target 1 face-up monster you control; Special Summon this card from your hand, and if you do, change the targeted monster to face-down Defense Position, also it cannot change its battle position for the rest of this turn. During your Main Phase: You can reduce this card's Level by 2 or 4, and if you do, Special Summon "Krawler" monster(s) with different names from your hand, Deck, or GY whose total Levels equal the amount reduced, in face-up and/or face-down Defense Position. You can only use each effect of "Krawler Soma" once per turn.