If that's the case, then the play dynamics for this specific type of battle would be somewhat closer to managing planeswalker cards
All you do is attack with the Jumbo Cactuar, and in response, cast Fling to sacrifice him and deal 10,000 damage to any one player
Combos Early combos are mainly about using Rush or Exert ability characters, and trying to keep your characters just hanging on
The Elf entering causes Morcant to trigger once again and you have an "infinite" loop, or at least one that lasts as long as your opponents have creatures
Collector Booster exclusive print treatment found in less than 1% of all language Collector Boosters
However, if you want a guideline for what kind of cards to look out for, it's good to refer to the Limited archetypes available