Though, as TKDbeast pointed out, the concept of a crystal-blue dude with his arms crossed like that feels very Yu-Gi-Oh
Its horribly aggressive and hard to remove profitably
Herald of Eternal Dawn can be a nice surprise threat, especially against red aggro and creature aggro in general, as these decks regularly lack the means to get rid of a 6/6
Expropriate: Cast it with Show and Tell, otherwise, a late game play, and an epic one, most likely
If the plotted card has any mandatory additional costs, those must still be paid to cast the spell
on the other hand, Cid, Timeless Artificer asks you to go wide while also creating an added draft and deck building incentive (note that there are very few Artificers in the set)