Divinestone

The Divinestone is a Dragonstone that appears in Fire Emblem: Ankoku Ryū to Hikari no Tsurugi, as well as its sequal and remake,  and Fire Emblem: Fūin no Tsurugi. It enables Fae, Tiki or Nagi to transform into their Divine Dragon form. It has a infinite number of uses in the former game, and 30 in the latter. It is effective against all types of Manaketes.

Ankoku Ryū to Hikari
Additional Info:
 * Mt: 12
 * Wt: 1
 * Hit: 100
 * Uses: Infinite
 * Rng: 1
 * Crit: 0
 * Worth: -
 * Tiki only, Effective against Manaketes (Not Earth Dragons)
 * Defence +15

Fūin no Tsurugi
Additional Info:
 * Mt: 16
 * Wt: 0
 * Hit: 100
 * Uses: 30
 * Rng: 1
 * Crit: 15
 * Worth: -
 * Fae only, Effective against Manaketes and Demon Dragons
 * Strength +12, Skill +12, Defence +15, Resistance +20

Shadow Dragon
Additional Info:
 * Mt: 18
 * Wt: 1
 * Hit: 100
 * Uses: 30
 * Rng: 1
 * Crit: 0
 * Worth: -
 * Tiki only, Effective against Manaketes and Earth Dragons
 * Strength +10, Skill +7, Speed +4, Defence +15, Resistance +11

(Defence and Resistance can only increase to a maximum of 30)