This is because cards are judged based on how they relate to and play against other cards
It is merely a reference to Honda's famous Hundred Hand Slap attack
This allows you to tap them to add Green mana to your mana pool
Kydele is a great way to generate mana, as each card you cycle gives a colorless mana that Kydele can generate, either to cycle more or to cast spells
Ulamog's Reclaimer is not exactly the most exciting of cards, and another 5-drop isnt exactly what we are looking for, but it does come with quite the stats upgrade over its predecessors as well as remaining a single color
this card's name and original ATK become that monster's original name and current ATK, also replace this effect with that monster's original effects, then that monster's ATK becomes 0, also its effects are negated