Thank you MythrilJenova for your advices. I was not aware of the hazard of Pithing Needle ! Although I use Mindshrieker also as a blocker, I think I can replace one of them with Mind Grind . However, you forget to mention Duskmantle Guildmage , Dimir Infiltrator and Muddle the Mixture , for a total of 9 more cards that I can utilise as a win con with the infinite mana. I gave a look to your decks and I was impressed by your Pili-Pala deck, so similar to mine but maybe even more effective. I think I'll put a set of Mizzium Skin in my deck replacing Mana Cylix . Then, I will insert some dual lands such as Darkslick Shores and Drowned Catacomb ; of course it can no longer be called a "budget deck".As regards Consuming Aberration , I prefer to leave it aside because of its fairly high mana cost. I am trying to build a deck that could win within the 4th turn, therefore I am looking for cards with a cmc of 2 or less.

No problem!