By giving the opponent a 1/1 Human token instead of a 3/3 Elephant, you significantly mitigate the risk of providing them with a meaningful attacker or blocker
It will be either in the title, or in the picture, or on the entire card
The decks other character, Cruella De Vil, Miserable as Usual, is a much cheaper card able to be played earlier on, and can force characters off the field when shes banished by returning a character to its players hand - playing into the decks more control-like tendencies
Even top-heavy decks like those need creatures in the early game, Rivaz fits the bill
The set has incredible reprints, including Imperial Seal to Mana Vault and everything in between
Their deck of cards is their spellbook, with which creatures are summoned to battle each other and attack the opponent with