In Diablo II Resurrected, Thunderstroke is part of the Matriarchal Javelin category and one of many unique Amazon Javelins in D2R. It is a relatively small item, taking 3 Blocks of space if you want to store it in the inventory or stash. Your character needs to reach at least the Required Level of 69 to carry this item. This Matriarchal Javelin has a Strength Requirement of 107 before it can be used. Another limitation is Dexterity, which should be 151 as the very minimum.
This is already the elite version of this Amazon Javelin, so it cannot be upgraded any further. The normal version is called Maiden Javelin, while the exceptional version is Ceremonial Javelin.
Note: If this item can have sockets, you might be able to get some runes and get one of the runewords as a result - if you place them in the correct order. Have a look at our builds to find out which items make the most sense for the character you're currently playing.
Below is a list of variations we can get for you from our network of trusted trade partners: