It has many of the same weaknesses as Progenitus in that it is a two turn clock that offers very little defenses
The issue is that the floor of the card (when its only making three or four mana) is still way too high, because Dockside is a card that can be looped, reanimated, flickered or cloned to such a degree that simply making an extra treasure or two is still enough to win the game
Interestingly enough, many of Mega Evolution's most valuable cards come from Ascended Heroes, with Team Rocket's Mewtwo ex being one of them
1 Traditional foil rare or mythic rare that's an extended-art, borderless, or retro frame card, or one of the following: A double rainbow serialized Eldrazi (250 of each) A foil-etched rare (9.3%) or mythic rare (3.9%) A traditional foil Special Guests mythic rare (10 cards total4.4%) A textured foil Special Guests Elemental (1.9%) or DFC planeswalker (1.9%) The remainder of this slot has the same content as the non-foil slot above with the percentages reduced appropriately to account for the inclusion of serialized, foil-etched, textured foil, and Special Guests cards
In our box, we cracked Shadowspear, the foil version no less which is beautiful to say the least
