High end

You may look at the top card of your library any time. You may play lands and cast Bird spells from the top of your library. If a land or Bird you control entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Flying T: Add one mana of any color.

This creature gets +1/+1 as long as you control a Swamp. B: Regenerate this creature.

Players skip their untap steps. At the beginning of your upkeep, sacrifice this enchantment unless you pay U.

Each player chooses a number of lands they control equal to the number of lands controlled by the player who controls the fewest, then sacrifices the rest. Players discard cards and sacrifice creatures the same way.

Whenever Ragavan deals combat damage to a player, create a Treasure token and exile the top card of that player's library. Until end of turn, you may cast that card. Dash 1R (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)

This artifact doesn't untap during your untap step. At the beginning of your upkeep, you may pay 4. If you do, untap this artifact. At the beginning of your draw step, if this artifact is tapped, it deals 1 damage to you. T: Add CCC.

This land enters tapped. When this land enters, exile target player's graveyard. T: Add B.

T: Add U. 1: Return Oboro to its owner's hand.

Boseiju enters tapped. T, Pay 2 life: Add C. If that mana is spent on an instant or sorcery spell, that spell can't be countered.

At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card.

Flying, trample At the beginning of your upkeep, sacrifice a creature other than this creature. If you can't, this creature deals 7 damage to you.

If this artifact would enter, you may discard a land card instead. If you do, put this artifact onto the battlefield. If you don't, put it into its owner's graveyard. T: Add one mana of any color.

Flash When this creature enters, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

Return target nonland permanent you don't control to its owner's hand. Overload 6U (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Trample Landfall — Whenever a land you control enters, double Tifa Lockhart's power until end of turn.

As long as this artifact is untapped, each spell that would cost less than three mana to cast costs three mana to cast. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost 1B to cast costs 2B to cast instead.)

Exile target creature. Its controller gains life equal to its power.

1: The next time an unblocked creature of your choice would deal combat damage to you this turn, prevent all but 1 of that damage.

This creature gets +1/+1 as long as you control a Swamp. B: Regenerate this creature.

T: Add G for each creature you control.

Flying (This creature can't be blocked except by creatures with flying or reach.) Nightmare's power and toughness are each equal to the number of Swamps you control.

Indestructible T: Add W. 5W, T: Harness The Mind Stone. (Once harnessed, its ∞ ability is active.) ∞ — At the beginning of your end step, exile up to one other target nonland permanent you control, then return that card to the battlefield under its owner's control.

Whenever an opponent casts a spell, you may draw a card unless that player pays 1.