User blog comment:ChickenRave/Sinne, the Mourning Father/@comment-7709681-20150126234047/@comment-7709681-20150127000307

Oracle is a mage/support that dedicates to buff and debuff allies and enemies, however, the correct order of his combo can turn a single target, either ally or enemy, into an undying monster that eventually burst himself.

Q Charges for a few seconds, if within range, the next target he selects is dealt Magic damage and is purged, disabling/cleansing buffs (Including those within his kit under a target).

W Turns a unit unable to attack and receives amplified Physical/True damage, but is inmune to Magic damage.

E Burst a target with Magic damage and, subsequently heals it over time. This spell is extremely spammable.

R Turns the target invisible without breakings stealth unless revealed by True Sight, and delays both health loss (Damage and health costs) and health regain (Heals, Lifesteal/Spell vamp and health regen) for the duration. At the end, all health regain is inmediatly granted by twice the total amount, and all damage dealt is inmediatly granted in a single burst of true damage.