From wikipedia:
Power creep is the gradual unbalancing of a game due to successive releases of new content.[1] The phenomenon may be caused by a number of different factors and, in extreme cases, can be damaging to the longevity of the game in which it takes place.
As new expansions or updates are released, new game mechanics or effects are introduced, making it increasingly difficult for older content to remain in balance without changes. Usually, this means new content releases grow successively more powerful while older content becomes relatively underpowered.
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I first noticed this happening during the Rituals Of The Order cycle and seriously increased with the coming of Ancient Relics cycle. Cards were becoming more and more powerful, and in a very straightforward way. The fact that many of the AP's have caused a lot of commotion when cards have been spoiled from them, like for example Catastrophic Explosion and Y'ha Nthlei Statue, is clearly a sign of leap in card power. The game was clearly increasing in power, which leads to faster games considering the speedy nature of the game.
Then again, unlike CCGs, LCG format is in my opinion less vulnerable to serious power creep as new expansions don't completely change the legal cardpool, just tweak it a bit. Also, there are a lot more cards with focus on one game situation and only few really "basic" cards, unlike in CCG format games. Personally i still think the current situation is slightly alarming, not because the powerlevel is increasing overall, but because in current situation it is very easy for a single deck strategy to suddenly become too dominant and break the game. Of course, this has always been a problem with this game anyway (Magah/Step nonsense?)..... So, what are your thoughts on the matter? Is this game having a serious power creep and should we be conserned?
(Sorry if the post is confusing, have slept way too little and played way too much Skyrim....
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. Overall, I think this design is extremely powerful, and I haven't seen much that can go toe to toe with it other than a similar deck.