Final answer:
Binary Airdrop in the game grants random completed items to units equipped with 2 items at the start of combat and avoids granting items with poor synergy.
Step-by-step explanation:
The correct statement about Binary Airdrop in the game is the second one: Binary Airdrop grants random completed items to units equipped with 2 items. This game mechanic works at the start of combat, where the affected units are temporarily bestowed an additional item to help them in battle. However, it is important to note that after updated changes, the item randomization now seeks to avoid granting champions items that have poor synergy, contrary to what statement 1 suggests. This means that the airdrop will not grant items to champions that would not benefit from them, addressing previous concerns where champions would receive items that were not optimal or synergistic for their abilities. Statement 3 is incorrect because the adjustment applies to all champions, not just Ziggs and Blitzcrank – they were simply examples used to illustrate the update. Lastly, statement 4, which refers to a date, is irrelevant in determining what Binary Airdrop does.