Same flaws as the card game What flaws there are with Arena are, fittingly, the same flaws you can identify with Magic: The Gathering
This little guy is the Jumbo Cactuar, a green creature that gets +9,999 power when it attacks, catapulting it to being the biggest creature Magic has ever seen
This card partners with a few other cards that lead into infinite loops that can kill an opponent pretty much by themselves, if your opponent cant stop this card from hitting the field, with cards like Sanguine blood, Epicure of blood, Marauding Blight-Priest, Vito, Thorn of the dusk rose, Defiant bloodlord, and cliffhaven vampire
I now had two Boon Reflections out, gaining 16 a turn off Rest for the Weary if I hadnt played a land and 32 a turn if I had played a land
Try it out
Mikaeus can kill the table with Walking Ballista if he's got a sacrifice outlet on the field, but I'm not aware of any replacements for Dina's favorite enchantment, Exquisite Blood