Curse of Strings is a rare spell that converts a sufficiently weak enough enemy to fight on your side. The strength requirement can be lowered when leveled up. Curse of Strings fits well into control decks.
Curse of Strings can be used to convert high strength units or units with powerful abilities.
Curse of Strings can be useful in that it can prevent a card's ability from triggering for your opponent and instead trigger for you.
An interesting strategy with Curse of Strings is to use it to gain a large amount of frontline at once, giving you the opportunity to play cards near the enemy base.
Convert a…unit with 8 or less strength…
Convert a…unit with 10 or less strength…
Convert a…unit with 12 or less strength…
Convert a…unit with 15 or less strength…
Convert a…unit with 18 or less strength…
August 7, 2017: Increased mana and maximum strength requirement by 2
January 31, 2018: Increased max strength requirement by 1
April 22, 2018: Decreased mana and strength requirement by 1