We recommend that players should consider adding permanents that have enters the battlefield triggers
7: You get an emblem with "Creatures you control have trample and haste and get +2/+2 for each differently named dungeon you've completed." Ellywick Tumblestrum's last ability counts all dungeons you've completed, whether they were completed before or after the emblem was created
You wont be able to use other land-related abilities, which makes the untap cards better, but more often than not, mana is all you need
Becoming the monarch is good, but this card truly shines in an aggressive deck that aims to win via combat damage, which taps into Aragorn, King of Gondor's red and white mana most of all, while blue is support
They can be particularly valuable in white decks, colorless/artifact strategies, or Eldrazi tribal decks where your traditional draw sources might be limited
Unless they have a way to kill or sacrifice their own creature, they're about to immediately lose