Since Mono-Red doesn't have access to non-artifact protection, Deflecting Swat is one of the ways to protect your most important cards
These cards are: Beatrix, Loyal General Rosa, Resolute White Mage Ultimecia, Temporal Threat Deadly Embrace Seymour Flux Judgment Bolt Lightning, Security Sergeant Cloud, Planet's Champion Sephiroth, Planet's Heir Xande, Dark Mage Megitek Scythe Ultima Weapon Fortunately, these are also the easiest cards to get
Tarkir: Dragonstorm's Sieges The Sieges give you two options as they enter and they are all upside
And we were about to be among the first to ever see it
As this is an attack trigger, and Isshin is a Warrior Samurai himself, it makes sense to base at least some of the deck around swinging in with just him or another Samurai for huge damage
If that's the case, then the play dynamics for this specific type of battle would be somewhat closer to managing planeswalker cards