Tomlinson, God of Gambles

When Tomlinson, God of Gambles enters the battlefield, you may choose a Signature Spell.
If you do, put that card into your hand.
(You may only cast one signature spell per game. No affects or abilities may allow a signature spell to be
cast or put into your hand, library, or graveyard, for
the rest of the game, including this ability.)
• Spin The Big Wheel
• Subgame Suicide
• Power Poker