Draw a card. Then, declare a color. Target SIGNI on your field gains (1) until the end of your opponent's next end phase. If you made a bet, instead it gains (2) until the end of your opponent's next end phase.
(1) "[Const: During your opponent's turn, this SIGNI gains [Shadow — SIGNI with declared color]."
(2) "[Const]: During your opponent's turn, this SIGNI gains [Shadow — Declared color]."
[Life Burst]: Return target upped SIGNI on your opponent's field to its owner's hand.