Other leaked cards include new versions of Garchomp, Heatran, Crobat, and others
Not only does it protect our board against wipes by making it so that we Amass whenever a Sliver dies, but it also gives Slivers we control Afflict 2 which disincentivizes our opponents from blocking
After that, it stays in play and turns every creature death into incremental life loss for opponents and life gain for you
Bodyguard allows the card to enter play exerted - rotating it 90 degrees to the side, which opens it up to possible challenges - in order to force the opponent to challenge the bodyguard card if they attack on the next turn
Overall I expect rotation to be a much bigger factor in Standard changing than Bloomburrows release
By design, Beza can pull you ahead from behind