But if you have a Command Tower, which makes mana depending on your commanders color identity, you have access to all the colors you could possibly need
1@TheThirdMan This seems to be asking for clarification on the meaning of "a card you own", as opposed to the other question which is asking for clarification of "has been banned or restricted in a Constructed format"
A deck that has a lot of synergy but had a bad mana base and a bad mana curve will still be clunky and awkward
There is nothing wrong with drafting an aggro deck, but make sure that you have at least some interaction and ways to slow the opponent down (Strip Mine, Thalia) or that your deck can do something more powerful than just cast 2-power creatures (Stoneforge + Batterskull, Phlage, planeswalker)
Also, grading companies like PSA also give each graded card a serial number which you can key into their website to check if your slab is legit