Bond of Discipline
The archetype here is the alpha-strike enabler dressed as a defensive spell. Tapping down the entire opposing board is a Falter effect scaled to every creature at once, and Falter effects have always been offense masquerading as tempo: your attackers get a clear runway while the defender's blockers sit sideways. Grafting lifelink onto that swing is where the design earns its five mana. It answers the standard objection to going all-in (a big attack leaves you open to the counterpunch) by converting the counterpunch into a non-issue: whatever you connect with pays you back, so an alpha strike that would normally be a coin flip becomes a cushioned one. The sorcery timing is the honest limitation. This does not save you from a swarm on your opponent's turn the way an instant-speed board tap would; you cast it on your own main phase, commit, and swing, which fixes its window firmly to the aggressor's seat rather than the defender's. It also asks for a wide board to justify the rate: one attacker gaining lifelink for five mana is a bad trade, but a table full of tokens turning sideways into a tapped-out opponent is a game-ending mass finisher. That is the deck it was built for, and the double-duty of "clear the blockers" and "insure the swing" in a single card is what makes it read as a payoff rather than a support piece.
