At the beginning of each of your main phases, if you haven't added mana with this ability this turn, you may add X mana of any one color, where X is the number of Islands target opponent controls.

This creature gets +2/+0 for each Mountain you control.
Whenever you attack with creatures with total power 12 or greater for the first time each turn, untap all attacking creatures. After this phase, there is an additional combat phase.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

This creature enters with two arms and two legs.
Whenever damage is dealt to this creature, remove an arm or a leg from it.
This creature can't attack if it has no legs and can't block if it has no arms.

Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
: Return this Aura to its owner's hand.

Creature tokens get -2/-2.

Switch the power and toughness of each of up to two target creatures until end of turn.

Destroy target artifact, creature, or planeswalker.

Enchant creature
Prevent all combat damage that would be dealt to and dealt by enchanted creature.

Battalion — Whenever Paladin Elizabeth Taggerdy and at least two other creatures attack, draw a card, then you may put a creature card with mana value X or less from your hand onto the battlefield tapped and attacking, where X is Paladin Elizabeth Taggerdy's power.

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

Nontoken artifacts you control are lands in addition to their other types. (They don't gain the ability to for mana.)
At the beginning of your end step, earthbend 2. (Target land you control becomes a 0/0 creature with haste that's still a land. Put two +1/+1 counters on it. When it dies or is exiled, return it to the battlefield tapped.)

The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it onto the battlefield.

Tarmogoyf's power is equal to the number of card types among cards in all graveyards and its toughness is equal to that number plus 1.

When Rosie Cotton enters, create a Food token. (It's an artifact with ", , Sacrifice this token: You gain 3 life.")
Whenever you create a token, put a +1/+1 counter on target creature you control other than Rosie Cotton.

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

+2: You may sacrifice a creature. If you do, search your library for a creature card with mana value equal to 1 plus the sacrificed creature's mana value, put it onto the battlefield, then shuffle.
+1: Mill five cards, then put any number of creature cards milled this way into your hand.
−1: Create a 4/4 green Rhino Warrior creature token.

Put a -1/-1 counter on target creature. When that creature dies this turn, its controller gets a poison counter.

During your turn, creatures and planeswalkers you control have lifelink.
+2: Sorin deals 1 damage to target player or planeswalker.
−X: Return target creature card with mana value X from your graveyard to the battlefield. That creature is a Vampire in addition to its other types.

Vigilance, trample, haste
When this creature enters, other creatures you control get +2/+2 and gain vigilance and trample until end of turn.