Zephyr is a Runeword "OrtEth" in Diablo 2 Resurrected (D2R). It requires these 2 runes to be inserted into a socketed item in the exact order: Ort + Eth . The eligible bases for Zephyr are the following: Bows, Crossbows, Amazon Bows . This is the only Runeword in the game that has X% Chance to cast Level X Twister when struck attribute.
ZephyrZephyrMatriarchal Bow
Ort · Eth
Two-Hand Damage: 26 to 62
(Amazon Only)
Required Dexterity: 187
Required Strength: 87
Required Level: 39
Base Attack Speed: -10
+33% Enhanced Damage
+66 to Attack Rating
Adds 1-50 Lightning Damage
-25% Target Defense
+25 Defense
+25% Faster Run/Walk
+25% Increased Attack Speed
7% Chance to cast Level 1 Twister when struck
Socketed (2)
Trade items on d2trader.net

How to obtain Zephyr

The fastest way to get this item on Battle.net is via trading, you can use the Item Price Checker to see how much Zephyr is worth.
Another way of getting this Runeword is by farming the runes and the base. Find the drop rates of these items in the Item Database.

Zephyr bases

The best base for Zephyr is Matriarchal Bow. Below is a list of all eligible 2 socket bases for Zephyr.