Frozen Hinterlands enters tapped. {T}: Add {W} or {U}. {1}{W}{U}: Until end of turn, Frozen Hinterlands becomes a 4/3 white and blue Spirit creature with with prowess and “Whenever this creature attacks or blocks, torment yourself.” It's still a land. (To torment yourself, lose 3 life unless you discard a card or sacrifice a nonland permanent.)
Whenever a creature you control dies, put a +1/+1 counter on Funerary Barge. Crew 1 (Tap any number of creatures you control with total power 1 or greater: This Vehicle becomes an artifact creature until end of turn.)
Desecrate (When this creature enters, you may sacrifice an artifact or land.) When Furnace Golem desecrates a permanent, you may return target artifact card from your graveyard to your hand.
At the beginning of your upkeep, you win the game if the total mana value of permanents you control is exactly 21. If it's more than 21, sacrifice Gambling Table and all Card tokens you control. Otherwise, create a colorless Card artifact token with mana cost {2} and “{2}, Sacrifice this artifact: Draw a card.”
{1}, Sacrifice Gasoline Canister: It deals 1 damage to any target. If a creature or planeswalker dealt damage this way would die this turn, exile it instead.
Clean up squads ensure civilians encounter as few mindbreaking aftermaths as possible.
When Gate of Realms enters, you may search your library for a land card, reveal it, and put that card into your hand. If you do, shuffle. {10}, {T}: Gate of Realms deals 3 damage to any target. This ability costs {1} less to activate for each different name among lands you control.
{T}, Pay 2 life: Add {B}. {T}: Add one mana of any color. Spend this mana only to cast spells from your graveyard or activate abilities of cards in your graveyard.
Gathering Beacon enters tapped. {T}: Add {G}. {2}, {T}, Sacrifice Gathering Beacon: Choose a creature or planeswalker type, then reveal the top five cards of your library. You may put a card of the chosen type into your hand, then put the rest on the bottom in any order.
GenTech Labs enters tapped. {T}: Add {G} or {U}. {G}{U}, {T}: Create a Function token with “This spell costs {1} less to cast if its mana value is 5 or greater.” Activate only if you have four or more cards in hand. (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)
Generative Edge enters tapped. {T}: Add {G} or {U}. {G}{U}, {T}, Sacrifice Generative Edge: Conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)
When Ghastly Ferry enters, create a 1/1 white Spirit creature token with flying. Ghastly Ferry can't be blocked except by Spirits. Crew 1 (Tap any number of creatures you control with total power 1 or greater: This Ship Vehicle becomes an artifact creature until end of turn.)