So I have put together my first edh commander deck. Going to post it on here for some help with it. Thanks in advance. Decklist follows

General: Niv-Mizzet, the Firemind
ancestral vision
relic of progenitus
basilisk collar
gamble
shattering spree
sage of epityr
brainstorm
curiosity
serum visions
swerve
reroute
isochron scepter
izzet signet
lightning greaves
into the roil
vedalken aethermage
remand
think twice
repeal
merfolk looter
merchant scroll
muddle the mixture
counterspell
prosperity
see beyond
jace beleren
electrolyze
wee dragonauts
gelectrode
reiterate
compulsive research
dream cache
wipe away
stoic rebuttal
deceiver exarch
counsel of the soratami
capsize
flux
deja vu
dissipate
trinket mage
gomazoa
rhystic study
divination
fabricate
mind spring
relearn
splinter twin
sift
careful consideration
dismal failure
venser, shaper savant
psychosis crawler
sphinx of lost truths
time warp
teferi, mage of zhalfir
mulldrifter
tidings
izzet chronarch
arcanis the omnipotent
jin-gitaxias, core augur
9 mountain
12 island
zoetic cavern
rupture spire
command tower
tolaria west
scalding tarn
rishadan port
izzet boilerworks
temple of the false god
unstable frontier
forgotten cave
misty rainforest
lonely sandbar
sulfur falls
blinkmoth well
ghost quarter
reliquary tower