For token decks, this means if one of your creatures produces a token when attacking, you get two instead
It used to be a Five Color essential, and you can really help mana screwed or color screwed folks out by giving them two lands
It offers 4v4 multiplayer and all Magic cards are available for free as well, so no need to invest anything other than your time
Control decks can also be a problem, as one of the best ways to disrupt control, forcing them to play cards on their turn, is hard for Reanimator decks to do, meaning that sometimes it becomes a waiting game of baiting your control playing opponent into taking action before you do, but even that might be difficult as many control decks forms of removal do so by Exile, not destroying things
Fortunately, Japanese variants of Ancestral Mask should be available to North American players who are willing to go the extra mile to acquire it