Declare Hellkite Tyrant as an attacker.
Hellkite Tyrant's myriad ability triggers, creating a token copy of it attacking each other opponent.
Deal combat damage with each Hellkite Tyrant.
Each Hellkite Tyrant's ability triggers, causing you to gain control of all permanents your opponent control, as they are all artifacts due to Mycosynth Lattice.
At the beginning of your next upkeep, Hellkite Tyrant triggers, causing you to win the game.

Gain control of all permanents

Win the game at the beginning of your next upkeep

Mass Land Denial

Hellkite Tyrant

Mycosynth Lattice

Blade of Selves

Activate Orthion's second ability by paying {6}{R}{R}{R} and tapping it, creating five token copies of Myr Battlesphere with haste.
When the Myr Battlesphere tokens enter the battlefield, they trigger, creating twenty 1/1 Myr artifact creature tokens.
At the beginning of your end step, Orthion triggers, causing you to sacrfiice the Myr Battlesphere tokens.
At the beginning of your next upkeep, Hellkite Tyrant's second ability triggers, causing you to win the game.

Orthion, Hero of Lavabrink

Myr Battlesphere

Legion Loyalty

On the end step prior to your turn, cast Saw in Half by paying {2}{B}, destroying Myr Battlesphere and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
The Myr Battlesphere tokens enter the battlefield, creating thirty-two 1/1 Myr artifact creature tokens.
At the beginning of your next upkeep, Hellkite Tyrant triggers, causing you to win the game.

Combos with "Hellkite Tyrant"