Weight Advantage: I will need to have a lot of creatures that are off-center with low Power and high Toughness to get this benefit
The Synchro monster is level 8 and has 2600 attack points, and requires one tuner and one regular monster to summon
Once at least four creatures have died, you don't ever even need to play Sephiroth, as every death will drain an opponent for one life
There are other solid options, such as Skithiryx, the Blight Dragon, that allow you to get around normally high casting costs while hitting the opponent for a ton of infect damage as well
This is a fun way for kids to demonstrate knowledge of historical figures, characters in a novel you studied, Greek mythology, animals (the possibilities are endless!)