Target player draws two cards and loses 2 life.

Pay 1 life, Sacrifice another creature: Create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Enchant player
Creatures enchanted player controls lose all abilities and have base power and toughness 1/1.
Enchanted player can't activate abilities that aren't mana abilities or loyalty abilities.

Sacrifice an artifact: Add .

This land enters tapped.
: Add .
: Add one mana of any color. Spend this mana only to cast artifact spells or activate abilities of artifacts.
Modular 1

Whenever a creature you control enters, draw a card if its power is 3 or greater. Otherwise, put two +1/+1 counters on it.

, Pay 1 life, Sacrifice this land: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.

+1: Empower Jace X, where X is the number of Islands you control.
−3: Until your next turn, whenever a creature attacks you or a planeswalker you control, it gets -5/-0 until end of turn.
0: Exile all but the bottom card of each opponent's library. Activate only if there are twenty-five or more loyalty counters among Jaces you control.

Target opponent draws two cards, then you draw up to four cards. That opponent may repeat this process as many times as they choose.

Double target player's life total. Shuffle Beacon of Immortality into its owner's library.

Counter target noncreature spell unless its controller pays .

Whenever Karn blocks or becomes blocked, it gets -4/+4 until end of turn.
: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value until end of turn.

, Sacrifice another creature: Draw cards equal to the sacrificed creature's power, then discard a card.
When Tom, Bert, and William die, if they were a creature, return them to the battlefield. They're an artifact. (They're no longer a creature.)

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.)

Other Elves you control get +1/+1.
, : Create a 1/1 green Elf Warrior creature token.

Whenever a player kicks a spell, you create a 1/1 green Saproling creature token.

When this enchantment enters, it deals X damage to each creature.
Whenever one or more creatures your opponents control die, you create a Treasure token. This ability triggers only once each turn.

When this creature enters, you may exile another target permanent you control, then return that card to the battlefield under its owner's control.

Sliver creatures you control have indestructible. (Damage and effects that say "destroy" don't destroy them.)