Sacrifice a creature: Draw cards equal to the sacrificed creature's power, then discard three cards.
"One day, an Autobot shall rise from our ranks and use the power of the Matrix to light our darkest hour. Until that day, till all are one." —Optimus Prime
When this creature enters, double the number of each kind of counter on any number of target permanents.
"Blue, glossy green, and velvet black, They coiled and swam; and every track Was a flash of golden fire." —Samuel Taylor Coleridge "The Rime of the Ancient Mariner"
Equipped creature gets +2/+2 and has protection from white and from blue. Whenever equipped creature deals combat damage to a player, put a +1/+1 counter on a creature you control, then proliferate. Equip {2}
"'The name of it,' said the lady, 'is Excalibur.'" —Sir Thomas Malory, Le Morte d'Arthur
You may look at the top card of your library any time. You may cast creature spells from the top of your library. You can spend mana of any type to cast creature spells.
Enchant player If a card would be put into enchanted player's graveyard from anywhere, instead that card is revealed and put on the bottom of that player's library.
[+1]: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle. [–3]: Target creature gets +X/+X or -X/-X until end of turn, where X is the number of Swamps you control. [–6]: You get an emblem with "Swamps you control have '{T}: Add {B}{B}{B}{B}.'"
When this creature enters, return target creature an opponent controls to its owner's hand. That creature's owner can't cast spells with the same name as that creature until your next turn.
As this creature enters, choose a creature type. This creature is the chosen type in addition to its other types. Other creatures you control of the chosen type get +1/+1.
[+1]: Untap up to two target artifacts. [–X]: Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle. [–5]: Artifacts you control become artifact creatures with base power and toughness 5/5 until end of turn.