Target opponent may have Risk Factor deal 4 damage to them. If that player doesn't, you draw three cards.
Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

First strike
: Add an amount of equal to the greatest power among creatures you control that entered this turn.
Partner (You can have two commanders if both have partner.)

: Add .
Whenever a legendary creature you control enters, you may have The Irencrag become a legendary Equipment artifact named Everflame, Heroes' Legacy. If you do, it gains equip and "Equipped creature gets +3/+3" and loses all other abilities.

Whenever another creature dies, or a creature card is put into a graveyard from anywhere other than the battlefield, or a creature card leaves your graveyard, Syr Konrad deals 1 damage to each opponent.
: Each player mills a card. (They each put the top card of their library into their graveyard.)

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
At the beginning of your upkeep, put a rust counter on each artifact target opponent controls. Then destroy each artifact with mana value less than or equal to the number of rust counters on it. Artifacts destroyed this way can't be regenerated.
When this enchantment leaves the battlefield, remove all rust counters from all permanents.

Trample
When Carnage enters, return target creature card with mana value 3 or less from your graveyard to the battlefield. It gains "This creature attacks each combat if able" and "When this creature deals combat damage to a player, sacrifice it."
Mayhem

This land enters tapped.
: Add .
, , Sacrifice this land: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.

At the beginning of each player's upkeep, if that player has no cards in hand, you draw a card and you lose 1 life.
Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Create X 2/2 black Zombie Berserker creature tokens, where X is the number of nontoken creatures that died this turn.
Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Flying
Tribute 2 (As this creature enters, an opponent of your choice may put two +1/+1 counters on it.)
When this creature enters, if tribute wasn't paid, it gains haste and "When this creature dies, return it to its owner's hand."

Time Lord's Prerogative — Whenever you cast a historic spell, copy it, except the copy isn't legendary. This ability triggers only once each turn. (Artifacts, legendaries, and Sagas are historic. A copy of a permanent spell becomes a token.)

Multikicker (You may pay an additional any number of times as you cast this spell.)
Choose target creature, then choose another target creature for each time this spell was kicked. Put X +1/+1 counters on each of them.

Bilbo can't be blocked.
Whenever Bilbo deals combat damage to a player, draw a card, then discard a card.

Whenever you cast your first spell during each opponent's turn, draw a card.

At the beginning of combat on your turn, create a token that's a copy of target noncreature artifact you control, except its name is Mishra's Warform and it's a 4/4 Construct artifact creature in addition to its other types. It gains haste until end of turn. Sacrifice it at the beginning of the next end step.

: Target creature that's attacking alone gets +1/+1 until end of turn.
: Target creature that's attacking alone gains your choice of deathtouch or lifelink until end of turn.

At the beginning of your upkeep, put a time counter on this enchantment.
Once each turn, you may pay rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on this enchantment.

At the beginning of each player's draw step, that player draws an additional card.
Whenever a player draws a card, this enchantment deals 1 damage to that player.

Noncreature spells cost more to cast.