TAG 5.5 (550599) and 5 (500549) / EX+ and EX: Like youd expect, 5s exhibit much of the same issues that plague slightly higher-graded cards, but with more wear
An Edric Commander is nasty, as I know
If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead
You can only use each effect of "Mermail Abyssnerei" once per turn
I asked people on Twitter what they thought of this whole situation, and their responses helped shape some of this piece
No one wants to take that ability to the face, but the card is exciting for a build archetype that needed some more options in my opinion, though looking over the suggestions for Virtus and Gorm commander deck list might give some good tech, like Access Tunnel