In EDH match, The situation is if I have Urborg, tomb of Yawgmoth and Caged Sun in play and I chose Black in order to generate double black source. if my opponent tap his land (let say it's an island and black is not his commander identity colour) for black source (because the effect from Urborg), does he get double colourless or just one colourless.
You mean if you use aetherling's blink effect and then your opponent responds with a kill spell can you use it again? Again yes, as long as you can pay the costs you can activate an ability as many times as you like (barring any other restriction the ability may put on itself, like loyalty abilities which can only be activated once per turn per permanent).
I have another question. Assume that there is a creature with ability to sacrifice himself to deal damage. Player A activate his ability but B cast the spell to kill this creature before his ability resolve. Can the creature's ability will be activated again?
If B has the mana then sure. The second activation would resolve first, making it monsterous (since it currently wouldn't be) and triggering its ability.
Is that the same result if the creature is Aetherling I mean if I use his skill to exile him before I let Doom Blade
resolve
The situation is, I cast Supreme Verdict to destroy Stormbreath Dragon on my opponent's field. However, he activate hisStormbreath Dragon ability to monstrosity in order to deal damage to me. Here I immediately cast Doom Blade to destroy the dragon.
My question is doesStormbreath Dragon deal damage and Is it the same result if the dragon play ability as sorcery and opponent castDoom Blade to destroy it first.
I have another question. Assume that there is a creature with ability to sacrifice himself to deal damage. Player A activate his ability but B cast the spell to kill this creature before his ability resolve. Can the creature's ability will be activated again?
Is that the same result if the creature is Aetherling I mean if I use his skill to exile him before I let Doom Blade
resolve
My question is doesStormbreath Dragon deal damage and Is it the same result if the dragon play ability as sorcery and opponent castDoom Blade to destroy it first.