Everything about this version of Mox Amber is unique, from the flavor text to the fantastic art from Steven Belledin
Adamant abilities will look at all the mana spent to cast the spell in question, including any additional or alternative costs you pay
Markov Waltzer is a great example of this archetype: The 1/3 Vampire has haste, so it can attack immediately, and flying, to bypass blockers
Svyelun of Sea and Sky will be a key part of Modern merfolk if that ever happens
The most sought-after pull among collectors is expected to be the Mega Darkrai ex Special Illustration Rare (116/084), illustrated by Akira Egawa
4 Elementals are really wonky as a tribe, their strength lies in individual cards, it's not enough to give them a general/banneret/land to enable tribalplay