Battle Angels of Tyr can spread one attack across the table. Myriad creates temporary attacking copies for the other opponents, allowing several combat-damage triggers from one original creature. Flying helps those bodies connect, and each hit checks whether the damaged player leads the table in cards, lands, or life.
The rewards are checked separately. You draw a card if that player has more cards in hand than every other player, make a Treasure if they control more lands than every other player, and gain three life if they have more life than every other player. A tie for the lead does not satisfy the relevant comparison. One hit might provide several rewards or none.
Isshin, Two Heavens as One can increase the myriad attack triggers, while token support can make the attack wider. The created copies enter attacking rather than being declared as attackers, so they do not recursively trigger their own myriad abilities. They are normally exiled at the end of combat, making their immediate damage and triggered rewards the main value.
In a four-player game, one opponent might have the most cards while another has the most lands. Hits on those two players can earn different rewards. Recheck the comparisons as each trigger resolves, because resources gained from an earlier trigger can affect a later comparison.
This is a useful Angel for white decks that expect opponents to pull ahead in resources. You still need to choose the original attack carefully and account for flying blockers around the table. The rewards are not guaranteed card draw simply because the Angel attacks. When several opponents have open skies and different resource leads, however, a single combat can supply both pressure and the resources needed for your next turn.
