The Tabernacle ties up all your opponent's mana, assuming they have plenty of creatures out, forcing them to choose to either give up a bunch of their creatures in exchange for a spell or to keep as many of their creatures as they can at the expense of spending all their mana
Elf decks in EDH already have lots of token making, and another anthem is welcome
Compared to many other cards, the land does not come in tapped, allowing you to use it right away
Moving lore counters between summons is a nice synergy as well, because you can keep powerful sagas around while accelerating another ones chapter progression
Since each Pokmon player gets to build their deck, you want to be sure you have the strongest Pokmon card
A 2/2 Vigilance for two mana isn't exactly groundbreaking, but the rules text is where this Charismatic Conqueror really shines