Extort (Whenever you cast a spell, you may pay . If you do, each opponent loses 1 life and you gain that much life.)
Whenever you tap a Swamp for mana, add an additional .

Until end of turn, lands you control gain "Sacrifice this land: Add ."

: Add .
, : Untap target Elf.

Equipped creature gets +3/+3 and has protection from each color that's not in your commander's color identity.
Equip commander
Equip

Defender
When this creature enters, draw a card.

Choose one. If you control a commander as you cast this spell, you may choose both instead.
• Creatures you control gain flying, vigilance, and double strike until end of turn.
• Creatures you control gain lifelink, indestructible, and protection from each color until end of turn.

Whenever an opponent draws a card, that player may pay . If the player doesn't, you create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

When this creature enters, create X Treasure tokens, where X is the number of artifacts and enchantments your opponents control. (Treasure tokens are artifacts with ", Sacrifice this token: Add one mana of any color.")

At the beginning of your upkeep, destroy target creature with a -1/-1 counter on it.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
At the beginning of your upkeep, you may return target Goblin card from your graveyard to your hand.

+2: Draw two cards, then put a card from your hand on the bottom of your library.
−2: Create a blue Dog Illusion creature token with "This token's power and toughness are each equal to twice the number of cards in your hand."
−10: Exchange your hand and library, then shuffle. You get an emblem with "You have no maximum hand size."

Whenever a creature you control with flying enters, it gains haste until end of turn.
Whenever a Dragon you control enters, it deals X damage to any target, where X is the number of Dragons you control.

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Untap target creature. Until end of turn, it gains hexproof, reach, and "Whenever this creature becomes tapped, it deals damage equal to its power to up to one target creature."

As this land enters, choose a creature type.
: Add .
: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

Deathtouch, indestructible
Rhonas can't attack or block unless you control another creature with power 4 or greater.
: Another target creature gets +2/+0 and gains trample until end of turn.

Equipped creature gets +2/+2.
As long as equipped creature is legendary, it has hexproof. (It can't be the target of spells or abilities your opponents control.)
Equip

: Search your library for a Sliver card, reveal that card, put it into your hand, then shuffle.
: Gain control of target Sliver. (This effect lasts indefinitely.)

When this creature enters, earthbend 1. (Target land you control becomes a 0/0 creature with haste that's still a land. Put a +1/+1 counter on it. When it dies or is exiled, return it to the battlefield tapped.)
Whenever you tap a creature for mana, add an additional .

This land enters with three mining counters on it.
, Remove a mining counter from this land: Add one mana of any color. If there are no mining counters on this land, sacrifice it.

This artifact enters with X charge counters on it, where X is your life total.
Landfall — Whenever a land you control enters, you may have your life total become the number of charge counters on this artifact.