Overview
Obsidia is weak in early game but her first skill makes up for poking, you need to stack up by poking enemy heroes and hitting minions till you finally have enough damage to rotate.
Strengths
Obsidia is very strong against heroes who rely on mobility like Natan,Gusion,Granger...etc.
Weaknesses
Obsidia is really weak against heroes with high damage or camouflage or high CC like Eudora or Saber
Best decision
Using magic boots for CDR and Haas'Claws for sustain and malefic gun and berserks fury for extra physical attack and rose gold for endurance
Attack speed and mobility
The Marksman emblem is good since it gives you attack speed and life steal with swift for extra attack speed and bargain hunter to save gold and quantum charge to heal and gain extra movement and attack speed
Battle Spell
Aegis is the best suited spell for Obsidia since it helps her with sustain and enduring damage while she kites damage
The start
Always keep farming and helping with turtle from time to time and keep aware of bushes and the enemies whereabouts to not get ambushed
Best With Lapu-Lapu
Obsidia synergies well with heroes who initiate and tank the damage while she kites safely
Watch Out For Belerick
Obsidia shouldn't fight belerick alone especially when he has blade armor to not get self eliminated