The tags for the swords are an interesting addition, but the higher-level tags seem unreasonable to get. The super-powerful level 15 tag (+497721 attack just for starters...) is likely going to pretty much be impossible to get, especially since we can't even buy the lower-level tags from the market. The max-level tag would cost the equivalent of 3^14 level 1 tags, or 4,782,969 tags. If the player decides to spend gold instead of tags, it would cost 23,914,845 gold, which is roughly $266,800. This just seems impossible to get... even the biggest spenders are never going to come close to spending that kind of money on the game. And here I thought the Sword of the Apocalypse was absurd with its 50,000 gold price tag, but that's nothing compared to the level 15 tag. Edit: By the way, since each sword can hold up to 5 tags, that's 837,019,575 gold, which is $9,338,000 or 167,403,915 level 1 tags.