AWC cards (for Blue, Red and Black)

[Darkenslight]

Inspired by looking at the AWC enchantments from Odyssey, here are my potential designs:

Expert Conclusions 
Enchantment (R)
At the beginning of your upkeep, if you have 15 or more Blue instant cards in your graveyard, you win the game.

Fury of Battle 
Enchantment (R)
At the end of your turn, if you dealt 10 or more combat damage to a single opponent this turn, you win the game.

Dark Times 
Enchantment (R)
At the end of your turn, if no player has a card in their hand, you win the game.

Thoughts and critiques are, as always, appreciated.