For seven mana you get an on curve 7/7 with four powerful keywords - flying (evasion), vigilance (very strong in multiplayer swinging at people in the air for Commander Damage and then holding the fort), deathtouch (no one wants to block) lifelink (nice double life swing for that 7 damage.)
If Llanowar Elves is level zero of the format, then Supreme Verdict is level one
Some examples of where this card shines include Haakon, Stromgald Scourge, Aryel, Knight of Windgrace, Sidar Jabari of Zhalfir, Syr Gwyn, Hero of Ashvale, and many others in commander
The triggered ability deals damage to the creatures controller even if the creature isnt dealt damage, perhaps because it has left the battlefield or because the damage was prevented