Otawara, Soaring City (Borderless Alternate Art) [Kamigawa: Neon Dynasty]Set: Kamigawa: Neon Dynasty Type: Legendary Land Rarity: Rare {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.

—Kor saying

Set: Sun & Moon: Black Star Promos Type: Fighting Rarity: Black Star Promo Retreat cost: Colorless

create X Runechant tokens

Set: Sun & Moon: Hidden Fates - Shiny Vault Type: Psychic Rarity: Ultra Rare Retreat cost: Colorless

Then that player loses all unspent mana and you add the mana lost this way

Set: Nintendo: Black Star Promos Type: Water Rarity: Promo Retreat cost: Colorless

and/or planar invasion

Spend this mana only to cast creature spells or activate abilities of creatures

If this spell was foretold

"Thrice Xuande's ardent quest led to Nanyang

Set: Amonkhet Invocations Type: Instant Rarity: Mythic Cost: {0} Counter target spell

the Wu kingdom controlled more than 7