best mox cards mtg Unveiling the Rarest and Most Expensive Magic Originally released April 2018 MtG Dominaria Mythic Rare Mox

A 5/5 Elemental with Flying, its base mana cost of (7)(U)(U) is deceptive thanks to its cost-reduction mechanic: the spell costs (X) less to cast, where (X) is the greatest mana value among Elementals you control

However, combining all three of these effects onto a single card makes for a very strong creature

It's rare but it does happen

When Silent Hallcreeper becomes a copy of the target creature, it's neither entering nor leaving the battlefield

Decks playing Gaea's Cradle are generally ones playing a ton of creatures, so it'll often generate enough mana to be able to cast your entire hand in just one turn

If you choose new targets, you must choose the same number of targets