Professor Hojo's last ability resolves before the activated ability that caused it to trigger
Rosewater wants the game to work if you only buy one deck, but also for there to be enough of a hook for a percentage of players to be enticed into acquiring more
It taps for any color you might need though it does have a bit more power to it than most mana creatures
While its a weaker mana rock than Gilded Lotus or Thran Dynamo and a weaker protection against losing the game than something like Platinum Angel, the combination of both is an intriguing prospect
Black mana offers lots of sacrifice outlets for both the caster and other players, such as Fleshbag Marauder, Plaguecrafter, Smallpox, and Village Rites, among others
If a spell or ability targets one or more targets only if a particular mode is chosen for it, its controller will need to choose those targets only if he or she chose that mode