At the beginning of your upkeep, investigate. (Create a Clue token. It’s an artifact with “{2}, Sacrifice this artifact: Draw a card.”) {T}, Sacrifice three Clues: Search your library for a card, put that card into your hand, then shuffle.
Sigil of Distinction enters with X charge counters on it. Equipped creature gets +1/+1 for each charge counter on Sigil of Distinction. Equip—Remove a charge counter from Sigil of Distinction.
{2}, {T}: Target opponent mills three cards. Put a land card from their graveyard onto the battlefield tapped under your control. It gains “If this land would leave the battlefield, exile it instead of putting it anywhere else.” {10}, {T}, Sacrifice Realmbreaker, the Invasion Tree: Search your library for any number of Praetor cards, put them onto the battlefield, then shuffle.
Equipped creature gets +4/+0. {R}{W}, Unattach Sunforger: Search your library for a red or white instant card with mana value 4 or less and cast that card without paying its mana cost. Then shuffle. Equip
Equipped creature has vigilance. Whenever another artifact or creature is put into a graveyard from the battlefield, put a +1/+1 counter on equipped creature. Equip
Trample (This creature can deal excess combat damage to the player or planeswalker it’s attacking.) Haste (This creature can attack and {T} as soon as it comes under your control.) At the beginning of the end step, sacrifice this creature.
{4}, {T}: You may put a historic permanent card from your hand onto the battlefield. (Artifacts, legendaries, and Sagas are historic.)
When Myr Retriever dies, return another target artifact card from your graveyard to your hand.
Equipped creature gets +1/+1 for each land you control. Equip legendary creature {3} Equip
Whenever a nontoken creature enters, if Genesis Chamber is untapped, that creature’s controller creates a 1/1 colorless Myr artifact creature token.
Kicker {3} Indestructible When Skyclave Relic enters, if it was kicked, create two tapped tokens that are copies of Skyclave Relic. {T}: Add one mana of any color.
Defender, indestructible {10}: Monstrosity 10. (If this creature isn’t monstrous, put ten +1/+1 counters on it and it becomes monstrous.) As long as Colossus of Akros is monstrous, it has trample and can attack as though it didn’t have defender.