You can tap it for no mana to add a burden counter and draw that many cards
Many planeswalker decks spam tokens for protection, so theres nothing wrong with creating more bodies
Typically, you only tap your own permanents when they attack, or when you activate their abilities
Civil War was a pretty cool event, and it truly revolutionized Marvel's storytelling model, making it more similar to episodic TV with its seasons
The secondary ability to grant +1/+1 counters on Obuun is easily the weakest component of the card and will likely be used just to pump itself so granting bonuses for all your creatures with +1/+1 counters will likely just become give this bonus to Obuun. Despite this, among the creatures there are some wonderful inclusions that try to keep this deck afloat such as Omnath, Locus of Rage, Rampaging Baloths, Admonition Angel, Emeria Angel and Mina and Denn, Wildborn