When you planeswalk away from Orzhova, each player returns all creature cards from their graveyard to the battlefield. Whenever chaos ensues, for each opponent, exile up to one target creature card from that player's graveyard.
Instant and sorcery cards in graveyards have flashback. The flashback cost is equal to the card's mana cost. Whenever chaos ensues, take an extra turn after this one.
{T}: Add {U}. Channel — {3}{U}, Discard Otawara, Soaring City: Return target artifact, creature, enchantment, or planeswalker to its owner's hand. This ability costs {1} less to activate for each legendary creature you control.
When you planeswalk to Oteclán and at the beginning of your upkeep, chaos ensues. Whenever chaos ensues, discover 3. (Exile cards from the top of your library until you exile a nonland card with that mana value or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)
When one or more creatures you control deal combat damage to a player, if there is no monarch, you become the monarch. Whenever chaos ensues, create a 1/1 black Assassin creature token with deathtouch and haste.
Reveal Paliano, the High City as you draft it. The player to your right chooses a color, you choose another color, then the player to your left chooses a third color. {T}: Add one mana of any color chosen as you drafted cards named Paliano, the High City.
Path of Ancestry enters tapped. {T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1.
When you set this scheme in motion, each opponent sacrifices a creature of their choice. If you control six or more lands, each opponent sacrifices another creature of their choice.
{3}: For each opponent who controls a creature, create a token that's a copy of a card named Arrest and attach it to a creature that player controls chosen at random.
Peat Bog enters tapped with two depletion counters on it. {T}, Remove a depletion counter from Peat Bog: Add {B}{B}. If there are no depletion counters on Peat Bog, sacrifice it.
"As a child, I was afraid of the dark. Now, I'm afraid of the things I know are lurking in the dark, waiting to bite my head off." —Sneeflebrix, expedition rogue
The final pages of the experiment log were blank. Investigators found it abandoned on a desk in the researcher's lab, open, the pages flipping in the wind from a shattered window.
{T}: Add {C}. {T}, Sacrifice Perilous Landscape: Search your library for a basic Island, Mountain, or Plains card, put it onto the battlefield tapped, then shuffle. Cycling {U}{R}{W}