Its interesting that you can attack with it and tap for mana later because it has vigilance, but unlike normal manlands, it stays as a creature, so its more vulnerable to removal
Saying this card is excellent might be an understatement, and the fact that it has bargain, a new mechanic in Wilds of Eldraine, on it is just nuts
On top of all of that, we see there are fantastic synergies and commander options that can leverage the gates for everything they have
Because the lands aren't entering the battlefield when they become copies of the creature, any "When [this creature] enters the battlefield" or "[This creature] enters the battlefield with" abilities of the copied creature won't apply
Crypt Incursion Crypt Incursion can be dicey since it relies on your opponents having creatures in the graveyard, but you only need to hit three or four creatures for this black instant to be a worthwhile investment, plus you get some incidental graveyard hate