There aren't actually any rulings about how the player must perform the shuffle, meaning that they could theoretically conceal their shuffling completely and turn your opponent's blocking into a complete guessing game as opposed to trying to follow the shuffle around which might have been the intention of the card
This blue instant has lots of potential in decks revolving around counters
The trouble is the whole deck is pretty much about Rex living, since it digs up the bodies and, um, eats them
When this card enters play, you revive a creature from either graveyard, put it under control, and give it a massive penalty of (wait for it) -1/0
The three attacking creatures don't have to be attacking the same player, planeswalker, or battle
Alharu, Solemn Ritualist Alharu, Solemn Ritualist can be a good way to generate tokens and makes it less of a setback when your creatures are removed