note: It's better to stand outside the aura to do the click and then enter because the achievement trigger is only when you enter the aura with the click effect from the gem active.
1. Fight Cargalia until they roar and a Frost Infused Velium Shard (blue gem) appears on your cursor. Spam fade/blur/invis and back off.
2. Walk to Malalafen and stand outside the aura. When aura appears, click the Frost Infused Velium Shard (blue gem) and step into the aura. An emote should inform you that the achievement updated.
3. Fight Malalafen until they roar and a Fire Infused Velium Shard (red gem) appears on your cursor. Spam fade/blur/invis and back off.
4. Walk to Cargalia and stand outside the aura. When aura appears, click the Fire Infused Velium Shard (red gem) and step into the aura. An emote should inform you that the achievement updated.
5. Fight Honvar until they roar and a Chaos Infused Velium Shard (yellow gem) appears on your cursor. Spam fade/blur/invis and back off.
6. Walk to Sivar and stand outside the aura. When aura appears, click the Chaos Infused Velium Shard (yellow gem) and step into the aura. An emote should inform you that the achievement updated.
7. Fight Sivar until they roar and a Lightning Infused Velium Shard (white gem) appears on your cursor. Be sure to kill the unmezzable gargoyle add (but not Sivar) because it will not despawn. Spam fade/blur/invis and back off.
8. Walk to Honvar and stand outside the aura. When aura appears, click the Lightning Infused Velium Shard (white gem) and step into the aura. An emote should inform you that the achievement updated.
9. Do the rest of the event as you normally would.