Hall of Triumph

As this artifact enters, choose a color.

Creatures you control of the chosen color get +1/+0.

: Add one mana of the chosen color.

As this artifact enters, choose a creature type.

Creatures you control of the chosen type get +1/+1.

: Add one mana of any color.

Flash

As this artifact enters, choose a creature type.

Creatures you control of the chosen type get +1/+1.

As this artifact enters, choose a watermark.

Creatures you control with the chosen watermark get +1/+1.

As this creature enters, choose a creature type.

This creature is the chosen type in addition to its other types.

Other creatures you control of the chosen type get +1/+1.

As this creature enters, choose a color.

When you control no permanents of the chosen color, sacrifice this creature.