Spare Dragonling is a rare dragon unit that gives strength to a friendly Dragon on death. The amount of strength it gives on death can be increased by leveling it up. Spare Dragonling works well in dragon decks.
Spare Dragonling works well as a way to synergize with dragons as well as to act as a combo piece for them.
Spare Dragonling should generally be played when it can attack and die, or in the back to set up a combo with another dragon.
However, playing Spare Dragonling without immediate effect can be countered by Execution or other damage effects.