Mark of the Dragon - Heart
At the beginning of the Duel, add 2 "Morphtronic Lantron" to your Deck. Then, add 1 "Power Tool Dragon" and "Life Stream Dragon" to your Extra Deck. In addition the following effect can be used the turn you Synchro Summon "Power Tool Dragon". Play 1 "Morphtronic Lantron" from your hand in Defense Position. This effect can only be used once per Duel. During the turn this effect is activated, you cannot Special Summon any monsters, except Synchro Monsters that list a Synchro Monster as material.