So in Nasuverse Cu Chulainn's Gae Bolg will literally oneshot any enemy when it hits you with its antilife curse. Gae Bolg is a high tier magic weapon that will ALWAYS reach the target, it doesn't matter how fast the enemy is, Gae Bolg will lock him almost forever.
In its greatest form, it is said to be seven flower petals made from light. It takes the form of a seven layered Bounded Field in the shape of an iridescent flower in reference to the rocket larkspur (Consolida ajacis) flower that bloomed from Aias' blood as he died, with seven petals representing the seven layers of oxhide. Each flower petal layer has the defensive power of a fortress wall, and Archer cannot personally recall any thrown lance that would be capable of penetrating even the first layer. It is necessary for its user to provide constant magical energy to form the shield, and if it is damaged, they will feel pain and receive damage in accordance.