User blog comment:GrandestGrandeur/Deck Build: Astrodragons/@comment-34715618-20180702003502

Phase seal chains is good especially for Astrodragons. You usually have your field with Gyron already tanking 2 single attacks and that makes it specially easy to activate the card's effect since you only need one more attack on the centre monster to use it. As FutureKnightx said there are very few decks that don't attack more then 3 times, maybe Size 3 control decks such as Athora, Plagues, Mother Dragon, a defensive build of Death Tallica, and that is only IF they don't have their size 0s on the field. In other decks you will allways get value out of that card and it's the best shield against the strongest aggro decks (Themps, Auto Deities, Ninjas, Knights, Swords, Purg Knights). Mars Barrier can be a more versatile card sure but its effect is much weaker hence why it is a worse shield the PSC

It makes the least sense running the card in Prisms out of all the Star Dragon archetypes, since being the one whose cards has the strongest defensive stats, it's the one that forces more link attacks to be made, hence less number of attacks per turn.

With the amount of disruptive cards God Punks are getting it is the deck I fear the most in this next format alongside Link Dragons. With a well built deck it will have a very easy time taking out the opponent's resources.