Mystical Arts: Explosion

Majutsu: Bakuhatsu (Mystical Arts: Explosion)
Ninjutsu (Katon; requires Concentration 12 ranks) [Fire, Lost Hijutsu]
Rank: 12 (S-Class);
Range: Long (30 ft. + 15 ft./2 extra chakra);
Area: 30-ft. radius burst centered on one creature or object (see text);
Duration: Instantaneous (see text);
Saving Throws: Dex half;
Chakra Resistance: Yes;
Chakra Cost: 12.

This technique is an ancient form of Ninjutsu created by the first generation of shinobi. It uses a long-lost chakra-weaving method called kuji-kiri that puts a sort of lock on the chakra used. The user weaves nine intricate symbols in the air with the index and middle finger of one hand, which must first be imbued with chakra. When the pattern is
completed, the user gently focuses chakra through the "seal" and attaches it to a target.

The subject is infused with a bomb that will detonate in 6 rounds. When the explosion
goes off, the blast deals 100 points of fire damage to all creatures in range, which can be halved with a successful Dex save. The damage also sets fire to combustibles and affects unattended objects. The target may also make a Dex save to avoid suffering full damage, at a -4 penalty, but may not take no damage on a successful save with abilities such as Evasion or Improved Evasion.

The bomb may be defused through the obscure method of channeling chakra into the
subject by simply touching it and making a Int check (DC 30), and spending 20 points of chakra; the subject may also perform this feat itself without requiring to touch itself. If the target was an object, it does not receive a save. The user can only target unattended objects. The user may also choose to defuse his bomb at any time.

The user suffers a 20% chance of failure when trying to perform this technique blinded.
Likewise, using the user's off-hand to perform the technique implies a -4 penalty.

Mastery
Every step of mastery in this technique reduces the time it takes for the bomb to detonate by 1 round. The user can choose to not use his full level of mastery and is not forced to reduce the detonation time by any amount.