For three mana, Councils Judgement is a white sorcery that says, Starting with you, each player votes for a nonland permanent you dont control
Cathars' Crusade is just nasty, giving you a huge +1/+1 counter buff when you cast something as small as Raise the Alarm
This, combined with other artifact synergies from artifact lands and cards like Arcbound Ravager, led to an unprecedented number of bannings in Standard to make sure that it was fully dead, which, in my book, is a huge testament to the brokenness of Skullclamp
The Pokmon TCG: Mega EvolutionAscended Heroes Mega Meganium ex Box, Mega Emboar ex Box, or Mega Feraligatr ex Box includes: 1 foil promo card featuring Mega Meganium ex, Mega Emboar ex, or Mega Feraligatr ex 1 oversize lenticular promo card featuring Mega Meganium ex, Mega Emboar ex, or Mega Feraligatr ex 4 Pokmon TCG: Mega EvolutionAscended Heroes booster packs
For example, Khans of Tarkir was a multicolored set with high complexity and relatively slow speed (owing heavily to morph), whereas Theros stressed monocolored decks (because of devotion) and big, individual threats (due to heroic and monstrosity)
Of the entire set, only two of them see any significant play