Because it specifically generates charge counters, Sun Droplet can enable powerful effects from cards that require or consume charge counters for damage, mana, removal, or extra turns.

Moderate agreement · 1 source supports

As an artifact, Sun Droplet is generally harder to remove than creature-based 'Soul Sister' effects, providing more resilient life gain.

Moderate agreement · 1 source supports

When paired with effects that increase life gain, such as Bilbo Birthday Celebrant, Sun Droplet can return more life per point of damage taken.

Moderate agreement · 1 source supports

Sun Droplet puts charge counters on itself equal to damage dealt, then allows the controller to remove one counter per upkeep to gain one life.

Moderate agreement · 1 source supports

Sun Droplet's consistent one-life-per-turn gain can repeatedly trigger effects that care about gaining life, even small amounts.

Moderate agreement · 1 source supports

Sun Droplet offers a colorless source of life gain, which is crucial for decks that want to utilize life gain synergies outside of white.

Moderate agreement · 1 source supports

Sun Droplet can quickly accumulate a large number of charge counters, which can then be abused by cards that interact with generic counters or transfer them.

Moderate agreement · 1 source supports

Sun Droplet helps mitigate the downside of self-inflicted or symmetrical damage effects, keeping the player alive longer in aggressive strategies.

Moderate agreement · 1 source supports

Based on the available limited evidence, Sun Droplet is a surprisingly versat…