Lilting Refrain

At the beginning of your upkeep, you may put a treasure counter on this enchantment.

Sacrifice this enchantment: Gain control of target creature with power less than or equal to the number of treasure counters on this enchantment. (This effect lasts indefinitely.)

At the beginning of your upkeep, put a time counter on this enchantment.

Once each turn, you may pay rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on this enchantment.

Enchant creature

When this Aura enters, tap enchanted creature.

Enchanted creature doesn't untap during its controller's untap step.

At the beginning of your upkeep, sacrifice this Aura unless you pay .

Enchant creature

Enchanted creature has "At the beginning of your upkeep, sacrifice this creature unless you pay its mana cost."

When this enchantment enters, create a token that's a copy of target nontoken creature.

When this enchantment leaves the battlefield, exile the token.

When the token leaves the battlefield, sacrifice this enchantment.

At the beginning of your upkeep, sacrifice this enchantment unless you pay .

At the beginning of your upkeep, sacrifice this enchantment unless you pay .

Blue creatures get +1/+1.