Another use to Gilder bairn

Equipped creature has ": Add one mana of any color." Equip

Enchant creature : Tap enchanted creature. : Untap enchanted creature.

Experiment Kraj has all activated abilities of each other creature with a +1/+1 counter on it. : Put a +1/+1 counter on target creature.

If you tap a permanent for mana, it produces twice as much of that mana instead.

, : Double the number of each kind of counter on target permanent. ( is the untap symbol.)

Activated abilities of creatures you control cost less to activate. This effect can't reduce the mana in that cost to less than one mana.