While its more expensive than Panharmonicon , the addition of an instant spell that can copy your activated or triggered abilities is quite nice and I think it helps justify the increased cost
Adding to the dark horror is the ability to eat things caught from the sea to aid your angling ability - if you can stomach munching on a dismembered foot, tumorous fish or mass of eyes, that is
Mentor of the Meek does require mana payment for the card draw, but you do get to keep using it as opposed to just once
Play two or three creatures in a turn, and youre generating mana, buffing your board, and drawing cards all at once
If you gain control of another player's permanent and it phases out, if the duration of the control-change effect expires before it phases in, that permanent phases in under that other player's control as your next untap step begins
The more you are leaning on a combo kill the better this is, the more you lean on aggression the worse this is