Raphael's Technique

• WWizards of the Coast2026-01-27
  Official Ruling
  Although a creature put onto the battlefield this way is attacking, it was never declared as an attacking creature. Abilities that trigger whenever a creature attacks won't trigger when that creature enters attacking.
• WWizards of the Coast2026-01-27
  Official Ruling
  A player may choose to discard their hand even if their hand contains zero cards.
• WWizards of the Coast2026-01-27
  Official Ruling
  If a creature spell's sneak cost was paid, the creature it becomes enters tapped and attacking the same player, planeswalker, or battle as the creature that was returned to its owner's hand to pay its sneak cost. This is a rule specific to sneak; in other cases, when a creature is put onto the battlefield attacking, that creature's controller chooses which player, planeswalker, or battle it's attacking.
• WWizards of the Coast2026-01-27
  Official Ruling
  Spells can only be cast for their sneak costs any time you could play an instant during the declare blockers step on your turn (after your opponent has decided whether to block).

Rulings via Scryfall