While in Defense Position: Once per turn, you can inflict 300 damage to your opponent
GSE Gold Secret Number 38: Hope Harbinger Dragon Titanic Galaxy X LIGHT Rank 8 [ DragonXyzEffect ] ATK 3000 DEF 2500 2 Level 8 monsters Once per turn, when a Spell Card or effect is activated on the field (Quick Effect): You can negate that effect, and if you do, attach that card to this card as material
Well that probably says even more than I just did
I worry that it may rely a bit too much on cards with a very high mana value, which can be a risk if your opponents play lots of counterspells and removal spells, but its hard to tell how itll actually work before having a chance to play it
Put Knuckles behind a Walls of Ba Sing Say and alongside an Academy Manufactor and just bide your time to victory
Meanwhile, preorders on MTG Marvel Super Heroes Play Booster Boxes are $20 at Amazon