8 {Island} 4 {Izzet Guildgate} 4 {Steam Vents} 5 {Mountain}
21 lands
4 {Spellheart Chimera} 4 {Blistercoil Weird} 4 {Nivix Cyclops} 3 {Artisan of Forms}
15 creatures
4 {Izzet Charm} 4 {Titan's Strength} 4 {Armed // Dangerous} 4 {Mizzium Skin} 4 {Teleportal} 4 {Quicken}
24 other spells
Sideboard
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So teleportal is your only sorcery, I don't think +1 and unblockable is quite worth needing two cards to play, or at least there are better solutions like instead of both cards, maybe just a playset of {Aqueous Form} (which also won't go away when the turn is over).
{Spellheart Chimera} is a good card, but it's not really worth playing until a little later in the game, so 4 of them seems a bit much.
I'm personally a fan of {Blistercoil Weird}, but as a one-drop with a not-totally-amazing ability, you could get away with bringing it down to 3.
So all that should free up space for other creatures/spells. Like burn and bounce spells. You'll be glad you did methinks
And maybe I'm just paranoid but with 2 colors, i wouldn't go as low as 21 total land