You can activate one the Planeswalker's loyalty abilities during your main phase on the turn it enters the battlefield, just like normal
Your deck will have a healthy number of colorless cards to dodge your own Ugin minus, and eight mana is the key number to make with seven lands, one of which is a Shrine of the Forsaken Gods
You can easily run cards that will abuse it, from Sakura-Tribe Elder or Bone Shredder to Attrition or Perilous Forays
If the target of Maze Skullbomb's last ability isn't a legal target as the ability tries to resolve (probably because it has left the battlefield), you won't draw a card
The card costs one colourless, one blue and one red mana, with stats of 2/2
Lastly, each card has keywords and abilities that give hints at in-game mechanics