Name a deck that this card would help.
It doesn't. That's not necessarily a bad thing though - in a CCG there should be "fun" cards that don't improve the metagame but create more deck options as morningstar stated. (With ETG's small amount of cards these are second priority to cards that do improve the metagame ATM, though.)
However, this card is really random with a bunch of different effects that you may not really 'remember' (Mutation has 3 possible effects max and Chaos Seed generally deals damage or other CC) and feels kind of bland in terms of design. It may be just me from looking at so many "random =
" and shard cards, but I think the idea can be improved on. I'd suggest lowering the range of random effects, and maybe also find something instead of a shard to base the idea on.