It's the same mana cost, destroys any enchantment, and draws you a card
Likewise, it could be that they have a spell/trap set in their spell/trap zone, so you can place a spell/trap in that same column on your side of the field, and now theres 2 cards in that column, letting you special summon a Mekk-Knight to it On top of being able to get out strong monsters this way multiple times per turn, they have multiple effects, some of which let you move the cards on the field so that you can summon to the same zone (because the columns had 2 or more cards in them) multiple times by letting you move the card you just summoned out of the way and put a new one there
the cards silver border and holofoil further bring out this effect
Win conditions include Link summoning Cosmic Slicer Zer'oll and Alien Shocktrooper M-Frame
C Common Forbidden Forbidden Royal Oppression X TRAP Continuous Either player can pay 800 Life Points to negate the Special Summon of a monster(s), and/or an effect that Special Summons a monster(s), and destroy those cards