It is an invincible monster in battle that can easily fly to an obstacle, such as 3 balls as a substitute angel
This means, that the cost of activating the ability (1 colorless energy) is meaningless if the rival has an ability that costs 3 energy (from any type), as Ditto won't be able to use the attack, and will waste its turn doing basically nothing
In the early game, it can be used to either set up a win condition or, in worse situations, dig for a necessary land, and in the late game, it can be pitched for a bit of card draw to get something you know you need
When this enchantment leaves the battlefield, shuffle your library
This is often two mana to draw two, which is a great rate
Introducing the Melodious Key Cards The melodious theme is composed of different cards, and to optimize your experience, we will only focus on the cards that see competitive play