First of all, your deck is always going to be five colors, so you need to prioritize mana fixing above all else
Tapping this artifact can be played as an interrupt. Only a very small number of the Gamma Playtest version of Mox Pearl are known to exist, and CGC Cards has only graded this single example
However, what makes this holiday card a true gem is that it settles the ultimate debate: is Die Hard(ened Scales) a holiday movie
First-Time Flyer Dropping a 1/2 flying creature on turn two is a decent creature, but if you're able to cast a one-mana Lesson spell on turn one, First-Time Flyer becomes a 2/3 flying creature instead
If you need to ban anything, its the other cards causing the format to skew this way, much like how Sultai decks in Standard are the fault of Oko, Thief of Crowns forcing you to play black answers and not the fault of Noxious Grasp
Sigarda, Host of Herons is an excellent protector of voltron commanders, the commanders edicts are especially effective against