Obliterate can’t be countered. Destroy all artifacts, creatures, and lands. They can’t be regenerated.
Haste Whenever Squee, Dubious Monarch attacks, create a 1/1 red Goblin creature token that's tapped and attacking. You may cast Squee, Dubious Monarch from your graveyard by paying 3R and exiling four other cards from your graveyard rather than paying its mana cost.
Double strike Whenever a Goblin or Orc you control deals combat damage to a player, exile the top card of your library. You may play that card this turn.
As Vorthos, Steward of Myth enters the battlefield, choose a named Magic character. Each spell you cast with the chosen character in its name, flavor text, or art costs WUBRG less to cast. This effect reduces only the amount of colored mana you pay.
Double strike Equipped creature has double strike. Reconfigure 2 (2: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn’t a creature.)
This spell can’t be countered. Flying, trample, protection from white and from blue R: Akroma, Angel of Fury gets +1/+0 until end of turn. Morph 3RRR (You may cast this card face down as a 2/2 creature for 3. Turn it face up any time for its morph cost.)
Defender Whenever you cast an instant or sorcery spell, Electrostatic Field deals 1 damage to each opponent.
Landfall — Whenever a land you control enters, exile the top card of your library. You may play that card for as long as it remains exiled. At the beginning of your end step, if there are cards exiled with Valakut Exploration, put them into their owner’s graveyard, then Valakut Exploration deals that much damage to each opponent.
Whenever you cast your first instant or sorcery spell each turn, copy that spell. You may choose new targets for the copy.
First strike When Combustible Gearhulk enters, target opponent may have you draw three cards. If the player doesn’t, you mill three cards, then Combustible Gearhulk deals damage to that player equal to the total mana value of those cards.
Dragon’s Approach deals 3 damage to each opponent. You may exile Dragon’s Approach and four cards named Dragon’s Approach from your graveyard. If you do, search your library for a Dragon creature card, put it onto the battlefield, then shuffle. A deck can have any number of cards named Dragon’s Approach.
All Sliver creatures have “This creature gets +1/+1 as long as you control a Swamp.” All Slivers have “{B}: Regenerate this permanent.” (The next time it would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)
Sliver creatures you control have “Whenever this creature is dealt damage, it deals that much damage to target player or planeswalker.”
For each land you control, create a colorless Treasure artifact token with "T, Sacrifice this artifact: Add one mana of any color to your mana pool."