Phoenix

Phoenix is a flexible and unique ranged strength hero with a plethora of powerful abilities that inflict heavy damage over time on its opponents at the cost of its own health. It can be played as either a support, initiator or semi-carry. Icarus Dive can serve as either a harassment tool, an initiating maneuver or an escape mechanism, all the while slowing and damaging opponents in its path, while its Fire Spirits burn and cripple the opponent's attack speed, making it a potent anti-carry. Sun Ray projects a powerful beam in front of Phoenix that burns enemies for a percentage of their maximum health while sacrificing some of its own health, and, if it ever sees fit, it can end its current life to turn into a searing Supernova. Surviving this stage of its life cycle allows Phoenix to reemerge in full strength, stunning all nearby opponents and with all cooldowns (except its ultimate) refreshed, ready to inflict havoc on its foes once again.

Tips

 * Phoenix is a very powerful initiator, disabler, nuker and chaser, having spells that make it powerful both in ganks and in teamfights. As such, playing Phoenix well requires an aggressive mindset and willfulness to take risks to make the most of its spells.
 * One of Phoenix' greatest starting weaknesses is its negative base armor, low base strength, the HP cost of its spells and low agility growth, resulting in severe vulnerability against physical damage. Building armor items on Phoenix should be considered a priority as without them it cannot participate that much in teamfights.
 * Since most of Phoenix' abilities cost a percentage of its current health as cost, health regeneration should be considered another major priority on Phoenix. Being able to heal yourself after casting spells increases your survivability and allows you to participate in teamfights and ganks more often with a much lower risk of death.
 * is a very powerful mobility spell as it quickly displaces Phoenix over long distances and does not cost any mana, meaning that it can be used whenever it is off cooldown. The dive can also be stopped at any point in the arc, allowing Phoenix to chase or escape as needed.
 * Icarus Dive slows and applies a damage over time debuff to any enemies it passes over. When using it to chase, it is a good idea to target the spell so that you pass over a fleeing enemy, as you can apply a slow to them before stopping the dive, making it easier for teammates to catch up, as well as apply player damage to them, potentially preventing them from using any s that are on hand.
 * are a powerful damage-over-time and attack speed slow debuff that can drastically impede the enemy's ability to deal physical damage. Used properly in a teamfight, the spirits can deal large amounts of damage.
 * Used as a harassing spell, Fire Spirits can greatly impede the enemy's ability to last-hit against you in lane, as their attack speed is cut down greatly on top of the damage over time.
 * The Fire Spirits take time to reach their destination, so good aim and prediction is required to apply the debuff to enemies. Try to predict the enemy's movements in order to lead them off with the spirits, or get closer to reduce the travel time.
 * Keep in mind that the debuff does not stack, only refreshes, so timing is the key to using this spell whether using it on a single enemy or multiple targets. Try to hit an enemy with a Fire Spirit just as the debuff from the previous one wears off, and you can deal a surprising amount of damage, up to 1120 before reductions.
 * Fire Spirits' best use comes right before casting Supernova. By applying the attack speed reduction to as many enemy heroes as possible, you can greatly hinder their ability to attack the Phoenix Sun to destroy it.
 * is a very long-ranged spell that can be used to support teammates while nuking enemies from a safe distance. Remember that it scales higher the longer it is fired, so most of its power comes at the end of the spell.
 * If a fight is moving away from Phoenix while casting Sun Ray, you can toggle movement to advance in the direction of the ray, allowing you to follow the action (albeit at a slow pace).
 * Toggling movement allows Phoenix to traverse over impassable terrain, which alone can be useful in an emergency situation where Icarus Dive is on cooldown.
 * is a very powerful teamfight spell as it can threaten the enemy with powerful burn damage and a spell immunity piercing stun if they do not change targets. It is a good distraction spell as it allows your teammates to capitalize on whatever decision the enemy makes, either kiting the enemy if they choose not to engage the Phoenix Sun and then focusing them down after the stun, or nuking and disabling the enemy while they group up to attempt to destroy the Phoenix Sun.
 * It is best to apply the slows from Icarus Dive and Fire Spirits, and then retreat a fair distance away prior to casting Supernova. Done properly, the enemy suffers from reduced movement speed and attack speed, greatly impeding them as they try to approach and attack the Phoenix Sun. Supernova's wide effect radius also gives you a measure of safety as you can cast it from a fair distance away, even over impassable terrain, and still burn and stun the enemy.
 * Supernova works best if your team has other wide-area disables such as or  that can be used either in tandem or as a counter-initiation spell. If the enemy chooses to initiate on the Phoenix Sun they open themselves up to being disabled by your teammates, allowing the spell to complete.
 * In general, you should try to wait until you are as low health as possible before casting Supernova, as you can force the enemy to waste spells and time that is negated by the ability. However, you also need to worry about the enemy team silencing you before you can get it off, so use the spell according to your judgment.
 * can be a very good investment for Phoenix. Its comparatively cheap price and high mana regen allow Phoenix to sustain its mana pool to cast spells whenever they are needed, and the active is a very powerful ability that opens up many possibilities for Phoenix. As Phoenix lacks any direct interrupting disables, the cyclone can be used to interrupt channeling spells or attempts to teleport away, and combined with Icarus Dive can be used to initiate on and disable an enemy from very long range. Finally, the active can be used on yourself to purge debuffs from yourself, particularly silences that may be preventing you from casting your spells.

Trivia

 * Phoenix' name in DotA was Icarus. It was removed during its port to Dota 2 for unspecified reasons.