This works in a similar way to if a single attacking creature is blocked by more than one creature, and the controller of Hundred-Handed One decides how to assign the damage among the attacking creatures just like you would when assigning damage to blockers
The "select retailers" Wizards alludes to in its announcement will be big box stores like Walmart and Target
Protecting your other equipment from cards like Fiery Confluence is just as important as protecting the creature itself
Elsa, The Fifth Spirit is a very strong amethyst card that takes down your opponents evasive characters while setting them up to take down specific cards
9 Vampiric Tutor Put That Vampiric Strength To Use As a Vampire Spawn, Astarion gained very little from his turning compared to a full Vampire
Combined with other all-star Humans like Thalia, Guardian of Thraben which also increases the cost of noncreature spells, your opponents will be paying tons of extra mana to remove your creatures