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
It only needs a few turns to become a serious threat, especially with cards that care about counters
However I wouldn't attack with this card, I would keep this card on the bench throughout the entire game and utilize its Ability
Youll usually have ample mana to work with too, so whats 1 more when casting a tutor, killing a creature, or putting one of your own out onto the battlefield
The Howling Abomination I just assume if my opponent untaps with The Howling Abomination that Im effectively dead