scareclaw yugioh deck Light-Heart - Power of the Elements Target 1 Scareclaw monster or 1 Visas Starfrost in your GY Scareclaw Decline - Yu-Gi-Oh! Card

While many players will still choose to build tier decks, the free cards from Golden Packs and the overall decrease in the cost of playing constructed on Arena might free more players to build fun decks or rogue brews since the risk building a deck that isn't successful is much lower since building a second deck should be much cheaper or less time consuming

And with this last one, we get to the end of the list

Both of these leave players open for their opponent to attack their life points directly which works against them to win a game

Dimir and Izzet builds lend well to drawing more cards, and the flash gives you an element of protection and surprise