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'Tap all lands target player controls and that player loses all unspent mana.
'Whenever you cast a multicolored spell, create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.") {X}{X}{X}, {T}:...
'When Adéwalé enters, reveal the top six cards of your library. Put an Assassin, Pirate, or Vehicle card from among them into your hand and the rest on the bottom...
'When Mana Conference enters the battlefield, each player secretly chooses a basic land type, then those choices are revealed. Mana Conference gains each basic land type that received at least...
'Tap all lands target player controls and that player loses all unspent mana.
'Return target nonland permanent to its owner's hand. Then that permanent's controller may sacrifice a land of their choice. If the player does, they may copy this spell and may...
'If you tap a permanent for mana, it produces twice as much of that mana instead.
'Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.
'Chain Lightning deals 3 damage to any target. Then that player or that permanent's controller may pay {R}{R}. If the player does, they may copy this spell and may choose...
'{1}, {T}: Add one mana of any color.
{T}, Pay 1 life: Add one mana of any color.
'At the beginning of your upkeep, flip a coin. If you lose the flip, this artifact deals 3 damage to you.
{T}: Add {C}{C}.