Megadramon's O attack does 920 damage, the highest we've seen so far if I remember right
Also, as mentioned above, once either player plays a Counter Trap Card, no other card or effect can be chained except more Counter Traps
Each pack includes 15 of the most desirable cards from Zendikar Rising
Heck, even my 60 card decks only ran like 20-22 lands while my Average Mana Value was like 3.75+
This synergizes with a1-225-sabrina, forcing opponents to move a less threatening Pokemon to the Active spot, buying you more time and getting Match Points on easier targets
Clockwork Knight Link-1 monsters have historically always been used for broken combos, and Clockwork Knight fills this niche perfectly by being an easy-to-make Earth Machine monster