Scar allows all Ally characters to get a +1 strength, and if Scar is exerted at the end of your turn, you could draw cards equal to the challenge strength of one of your Ally character cards, although you must discard two cards and banish that character
Welcoming Vampire can be a bit counterintuitive with Inspiring Leader, since the enchantment only increases the power of token creatures
You only need to connect with an opponent once if you have the proliferate abilities to do the rest, but you can also pump out a bunch of tokens and grant them deathtouch with Ohran Frostfang
Its first ability can have a lot of applications, allowing you to both tap down your opponents permanents and untap yours
Of course, you don't have to cast the Adventure at all
Permanently shutting off lifegain is really nasty, but so is having an improved Stuffy Doll effect on a creature this efficient