A Legendary drop can look ordinary at first glance, especially when the top lines are packed with Dexterity, resistances, or Evade charges. Those are useful, but the gold effect at the bottom is usually what changes a build. When comparing D4 items, it pays to check that effect before looking at almost anything else. A strong Aspect can turn a decent pair of boots into a key part of your setup, while a poor roll can make an otherwise attractive drop hard to justify.
Why the roll matters
Sickfoot's Aspect is a good example because its value isn't fixed. It grants Movement Speed and Damage over Time Speed for every nearby enemy suffering from your damage-over-time effects. The bonus stacks, so the difference between a low roll and a perfect one gets very noticeable in crowded fights. You'll feel it while clearing Helltides, pushing through dungeons, or trying to keep pace with a fast-moving group. Don't just see the Aspect name and assume the job's done. Check the number. A 1.5% roll per stack has far more room to work than a 1.0% version once the stacks start building.
Quick comparison
Save the effect, not the item
A common mistake is filling the stash with Legendary gear just because one piece has a useful gold line. You don't need to do that. Salvage the item at a Blacksmith and the Aspect is added to your Codex of Power. If the salvaged version is better than the one already saved, the Codex keeps the stronger roll. That's the part players should care about. The original weapon, ring, or boots may have awful affixes, but the upgraded Aspect stays available across your account. It's a simple habit: inspect the roll, salvage upgrades, then clear the clutter.
Put it on the gear you actually want
After the Aspect is stored, visit the Occultist and imprint it onto a Rare or Legendary item with affixes that suit your build. Slot rules still matter. Mobility Aspects such as Sickfoot's usually belong on Boots or an Amulet, so you can't force them onto every item. Boots are often the practical choice, while an Amulet may be worth it if the build benefits heavily from the effect. Players looking for the best place to buy diablo 4 runes may also be planning a broader upgrade path, but the same rule applies: keep strong rolls in the Codex and spend them on gear with stats you'll actually use.