Not actually awful. 6/6 fliers for 6 in blue are good value, and it does stuff if it gets removed. Probably an option after better card draw options rotate out. Soul of Zendikar's also been spoiled. It also indicates a Soul of Theros, Soul of Innistrad and Soul of Shandalar coming to complete the cycle.
Oh, and Convoke is the M15 returning mechanic.
Soul of Ravnica
Creature — Avatar {M}
Flying
: Draw a card for each color among permanents you control.
, Exile Souls of Ravnica from your graveyard: Draw a card for each color among permanents you control.
[6/6]
Oh, and Convoke is the M15 returning mechanic.
Soul of Ravnica
Creature — Avatar {M}
Flying
: Draw a card for each color among permanents you control.
, Exile Souls of Ravnica from your graveyard: Draw a card for each color among permanents you control.
[6/6]