M:tG card similarity search
1BR · Enchantment
Cumulative upkeep {1} (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 Corrosion leaves the battlefield, remove all rust counters from all permanents.
| Name | Mana | Type | Text |
|---|---|---|---|
| Thopter Arrest | 2W | Enchantment | When Thopter Arrest enters the battlefield, exile target artifact or creature an opponent controls until Thopter Arrest leaves the battlefield. |
| Gaze of Granite | XBBG | Sorcery | Destroy each nonland permanent with mana value X or less. |
| Now I Know My ABC's | 1UU | Enchantment | At the beginning of your upkeep, if you control permanents with names that include all twenty-six letters of the English alphabet, you win the game. |
| Artisan's Sorrow | 3G | Instant | Destroy target artifact or enchantment. Scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.) |
| Expose to Daylight | 2W | Instant | Destroy target artifact or enchantment. Scry 1. |
| Keeper of Keys | 3UU | Creature — Human Rogue Mutant | When Keeper of Keys enters the battlefield, you become the monarch. At the beginning of your upkeep, if you're the monarch, creatures you control can't be blocked this turn. 4/4 |
| Electrosiphon | UUR | Instant | Counter target spell. You get an amount of {E} (energy counters) equal to its mana value. |
| Simic Ascendancy | GU | Enchantment | {1}{G}{U}: Put a +1/+1 counter on target creature you control. Whenever one or more +1/+1 counters are put on a creature you control, put that many growth counters on Simic Ascendancy. At the beginning of your upkeep, if Simic Ascendancy has twenty or more growth counters on it, you win the game. |
| Darksteel Reactor | 4 | Artifact | Indestructible (Effects that say "destroy" don't destroy this artifact.) At the beginning of your upkeep, you may put a charge counter on Darksteel Reactor. When Darksteel Reactor has twenty or more charge counters on it, you win the game. |
| Primal Order | 2GG | Enchantment | At the beginning of each player's upkeep, Primal Order deals damage to that player equal to the number of nonbasic lands they control. |