If you tap a basic land for mana, it produces three times as much of that mana instead.

You may spend mana as though it were mana of any color to activate abilities of creatures you control.
Creatures you control with +1/+1 counters on them have all activated abilities of all creature cards exiled with Agatha's Soul Cauldron.
: Exile target card from a graveyard. When a creature card is exiled this way, put a +1/+1 counter on target creature you control.

Double strike
Other creatures you control get +1/+0 for each Aura and Equipment attached to Kellan.

If a permanent entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

At the beginning of your upkeep, put target creature card from a graveyard onto the battlefield under your control.

At the beginning of your end step, put a +1/+1 counter on each creature you control. Untap those creatures.

Whenever a source you control deals noncombat damage to an opponent, you may exile that many cards from the top of your library. You may play those cards this turn.

Activated abilities of creatures you control cost less to activate, where X is Agatha's power. This effect can't reduce the mana in that cost to less than one mana.
: Other creatures you control get +1/+1 and gain trample and haste until end of turn.

Each creature that's enchanted by an Aura you control can't attack you or planeswalkers you control.
At the beginning of your end step, each opponent loses X life and you gain X life, where X is the number of Auras you control.

Menace
: Spells you cast this turn that are black and/or red cost less to cast, where X is the amount of life you lost this turn. Activate only as a sorcery.

Vigilance
: Spells you cast this turn that are white and/or blue cost less to cast, where X is the amount of life you gained this turn. Activate only as a sorcery.

Trample
Permanent spells you cast that have an Adventure cost less to cast.

Whenever you tap an untapped creature an opponent controls, you may pay . When you do, choose one —
• Create a 4/4 white and blue Elemental creature token.
• Put a +1/+1 counter on each creature you control.
• Scry 2, then draw a card.

You may cast this spell as though it had flash if you pay more to cast it.
For each creature your opponents control, create a Cursed Role token attached to that creature. (If you control another Role on it, put that one into the graveyard. Enchanted creature is 1/1.)

Flying
As Talion enters, choose a number between 1 and 10.
Whenever an opponent casts a spell with mana value, power, or toughness equal to the chosen number, that player loses 2 life and you draw a card.

Whenever this creature enters or attacks, mill three cards, then return a land card from your graveyard to the battlefield tapped.
Activated abilities of lands you control cost less to activate.
Land creatures you control get +1/+1.

Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)
Search your library for a card, exile it face down, then shuffle. If this spell was bargained, you may cast the exiled card without paying its mana cost if that spell's mana value is 4 or less. Put the exiled card into your hand if it wasn't cast this way.

If you would pay life while your library has at least that many cards in it, exile that many cards from the top of your library instead.
+1: Look at the top two cards of your library. Exile one of them and put the other into your hand.
−2: Create two 1/1 black Nightmare creature tokens with "At the beginning of combat on your turn, if a card was put into exile this turn, put a +1/+1 counter on this token."
−7: Target player exiles the top X cards of their library, where X is the total mana value of cards you own in exile.

Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)
Flying, haste
When this creature enters, if it was bargained, add four mana in any combination of colors.
: This creature deals 1 damage to any target.

Flying
When this creature enters, creatures you control gain flying and get +X/+X until end of turn, where X is the number of creatures you control.