The-DM's Intervention

Create 5 Dice artifact creature tokens. They
must be represented with D20 dice, and have:
"This creature's power and toughness are equal
to the face-up face on this die, and this creature's
color is equal to the color of this die.
(You may roll this creature at any time.)
Whenever this creature's power or toughness
changes (even by accident), the last player who
touched this creature loses 1 life."