Your deck runs a 1-of copy of enchantment removal
These Enchanted cards feature cards from the set with a new, borderless alternative visual and the "Inkwash Foil" foil treatment, which differs from the classic foil on expansion cards
The developers of MTG Arena said they decided against a disenchant system because it created feel-bad moments when people disenchanted cards they needed later
If you target an Aura with Immovable Rod's last ability, it will lose its enchant ability and be put into its owner's graveyard because it can't legally enchant anything
Players might initially pick tribes with high average mana values like Dragons or Angels or Sea Monsters (Krakens, Leviathans et al.), or pick commanders themselves that have a high mana value
A bit too important for me to leave to the end, the Mightstone and Weakstone are two of the artifacts found by Urza and Mishra in the Caves of Koilos ( that is a card I use a lot in actual magic) and they fought over these for a good chunk of the conflict