mtg black adventure cards The Full Land cycle : r/custommagic Promise of Aclazotz // Foul

You're getting more interaction and more bodies in your deck while using fewer slots

Sacrificing one creature wont do much, but it starts to add up and out-value your opponents if you have plenty of benefits through cards like Dictate of Erebos or Desecrated Tomb

As part of the Onslaught block, Legions had tribal synergies as a theme

Mystic Snake was often a way to do damage to an opponent who you otherwise couldn't find an opening to get a threat down against or a two-for-one by fighting one of the many bears that were in decks in those days, and when it did these things it was good

Its also so old that the text box is stuffed full of words that no longer need to be there