There is no hard limit. You can use a 100% artifact deck if you wish. It might not necessarily be viable depending on format, but there are some artifact land, and some 0-cost artifacts that produce mana.
A giant deck is a deck consisting of the creature type giant.
You can do a search at allmagiccards.com and essentialmagic.com
60-75 cards,
You just need a good deck with flying and cards that give you life
The best place to make a deck online would be cockatrice.de because after you make a deck you can test for free.
Email me at ocwilles@gmail.com if you can help me!
Use the Store and Event Locator from Wizards.
I presume that you mean tournament packs. If so they are random.
If you are referring to a pre-constructed deck, you can buy one at any store that sells magic cards, or anywhere online that also sells magic cards. If you are referring to a deck archetype, you will need to search online for a decklist of cards that you require.
Could the asker please direct us to a decklist for the deck itself? We can't help until that happens.
The Wikipedia claims that the Black Lotus is the most valuable card ever.
a deck that you can pilot well and be able to respond to threats or know your "outs" in sticky situations.