Mind's Desire
{4}{U}{U}
Sorcery
Shuffle your library. Then exile the top card of your library. Until end of turn, you may play that card without paying its mana cost.
Storm (When you cast ~this~, copy it for each spell cast before it this turn.)
Oracle's Vault
{4}
Artifact
{2}, {T}: Exile the top card of your library. Until end of turn, you may play that card. Put a brick counter on ~this~.
{T}: Exile the top card of your library. Until end of turn, you may play that card without paying its mana cost. Activate only if there are three or more brick counters on ~this~.
Urza, Lord High Artificer
{2}{U}{U}
Legendary Creature -- Human Artificer
1/4
When ~this~ enters, create a 0/0 colorless Construct artifact creature token with "~this~ gets +1/+1 for each artifact you control."
Tap an untapped artifact you control: Add {U}.
{5}: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.