Angelic Guardian

The attack trigger is the whole reason this Angel exists, and it flips the usual math of a mass-alpha strike. Normally the risk of swinging with everything is that your opponent trades up in combat and picks off your board with removal; here, once the trigger resolves, they cannot be destroyed for the rest of the turn. Chump blocks bounce off, combat-damage kills evaporate, and instant-speed destroy effects stop being answers to your attack. Note the exact boundary of the protection: it is indestructibility, not full shroud, so bounce, exile, edicts, and minus-toughness effects still work, and the grant lasts only until end of turn (the creatures are vulnerable again on your opponent's swing back). The body itself is a stock six-mana flying beater, but the ability rewards going wide rather than tall: one attack step converts a whole team into an un-tradeable board. That the effect is untargeted (no activation cost, no dependence on the Angel surviving once the trigger is on the stack) is what separates it from the many white creatures that hand out combat protection one creature at a time. It is a straightforward payoff for a token or aggro-swarm shell that wants a single card to make its attack step lethal without fear of blocks.