Sign in Blood and Night's Whisper both give you two cards for 2 mana, with Sign in Blood adding the quirky option of targeting an opponent to finish them off
The blue mode was where card drawing started out, before going away to allow a black effect (see below), and then returning to be on the green-white-blue Charm, and the black mode was an earlier version of the black mode on the black-red-green Charm
(Well, this is coming from someone who didnt know anything about ML prior to watching the video, so take my review with a grain of salt
During the event, players have a chance to encounter a wild Pikachu in Pokmon GO wearing the event-exclusive hat in the wild
Wizards clearly stated back in 2016 that it has no desire to police proxies, even for in-store play, as long as the events aren't sanctioned and the events are using traditional proxies and not counterfeit cards
Where to Find Master Ball Foils These cards are currently exclusive to Japanese booster boxes such as the 151 set