Infernius Spawnington III, Esq.

Flying, first strike, trample, haste
This spell costs {3} less to cast for each card you've revealed this turn.
When this creature enters, you may say "I'm here." If you do, it deals 3 damage to target player.

The List (Unfinity Foil Edition)

Unsanctioned

Flying, first strike, trample, haste
This spell costs {3} less to cast for each card you've revealed this turn.
When Infernius Spawnington III, Esq. enters the battlefield, you may say "I'm here." If you do, it deals 3 damage to target player.

Reveal is a keyword action. A card is revealed if a spell, ability, or rule instructed you to reveal it, using the word “reveal.” While you are allowed to show your hand to other players just because you feel like it, that isn’t “revealing” those cards.