by iNano78
Since you purchase cards at the end of your turn, Keep cards usually won't do anything until either your next turn or at least during the next player's turn (e.g. Jets, Burrowing, Wings, etc). I guess a Discard that damages opponents could trigger a newly purchased Keep card that triggers on dealing damage. For example, you could purchase Eater of the Dead followed by a Discard that immediately kills another monster (thus triggering Eater of the Dead).On the other hand, something like Alpha Monster wouldn't do anything, as you've already performed your attack earlier in the turn before you purchased it.