There is 1 Combat Phase, and the Combat phase has an attack step. I'm not sure where you get 4 subphase(I assume you mean step as there is no subphase in VS)

By 4 I think he meant each person (in a two player game) gets an attack step and an attack sub-step. But yes, there are no "sub-phases."

In case this got lost, this is how to keep Roy from stunning your Mr. Fantastic.

Your opponent pumps Roy. It resolves.
Pump Roy (resolves)
Pump Roy (resolves)
Pump Roy (resolves)
Pump Roy (resolves)

Roy is now a 14/3 and your opponent has one more ready character. He activates that character to pump Roy. In response to this pump, you use Mystical Paralysis, targeting Roy.

Now your opponent is stuck. If he doesn't activate Roy in response to Paralysis, Roy will get exhausted. But he can't stun Mr. Fantastic unless Roy's a 16. If he activates Roy now, when Roy's effect resolves (with Paralysis and Roy's last pump still on the chain waiting to resolve), Roy won't stun Mr. Fantastic.

Note that unless Roy's ATK is greater than Mr. Fatastic at the time of activation, Roy can not target Mr. Fantastic. Targets are checked upon playing the effect as well as resolution of the effect.

If you're playing Gotham Knights, you can Fizzle Teen Titans Go!, preventing the characters from being readied.

If you're playing Spidey-Friends, you can Nice Try! Roy's effect.

Oops. Anyway, the point still holds: if you do it this way they can't stun Mr. F.

going back to the "the stack is the same as the chain" thing several people said on p2: actually there is one somewhat major difference between magic's stack and VS's chain rules:

in magic, after you put a spell or ability on the stack, your opponent gets priority

in VS, the player with priority may put effects on the chain until he passes priority

in many cases these differences aren't huge, and in vs you could just pass priority after each effect you put on the chain to see if your opponent will "jump"

but they are different.

That is incorrect.

Wow...is there a game whose rules you don't have memorized?
Seriously, you're really Johnny 5 from Short Circuit, aren't you?

How many games do you follow in terms of the rules? Just pulling quotes out like it was nothing. lol I used to track HC, but I kinda got sidetracked with this game.

I think the only answer to negating Roy's effect is to use a card that specifically negates a character's activated ability. I think there are few characters that can do this in WOS. I can't remember which ones (if any) do it in DC and Marvel Origins.

Nice Try, Fun and Games or even Utility Belt from DC.

As for the stack vs chain thing... I get that a lot from MtG players. The common misconception is that when a player puts an effect on the stack, the next player gets a chance to "respond" when in fact the primary player still has an opportunity to put more effects on the stack.

I keep telling them that it's the same but since I've never read the CR in MtG I can now thank Zaxx for pointing out that section.

The biggest complication is that Magic used to have many timing issues, with the difference between "instants" and "interrupts" being drastic.

The common thing to do was to say "in responce to that" so much that, for everyone who played around us, the common thing to do was to let each effect resolve individually anyway (once 6th edition updated the rules).