Convoke (Each creature you tap while playing this spell reduces its cost by 1 or by one mana of that creature’s color.)
Each Sliver spell you can cast has Convoke.
The cooperating swarm calls others as one harmonious chord.
Now on the new Guilds of Ravnica set Selesnya became the "convoke" guild, but I had already used up that 2 color combination elsewhere. I see this a bit like white non-land ramping in white (another white ramping route is trying a Land Tax effect to Slivers)
Peace Sliver 1WW
Enchantment Creature — Sliver :uncommon:
Creatures can’t attack you or a planeswalker you control unless their controller pays X for each of those creatures, where X is the number of untapped Sliver creatures you control.
To protect their hive and live in peace, the watchful slivers drain power form advancing enemies.
Here it may be a bit aggressive at 3 CMC, the effect is similar to that of [[Sphere of Safety]] for untapped slivers. Being Enchantment Creature makes it easier to remove, I mase all the two single colored mana Slivers like that.
Lawful Sliver 2WWWW
Legendary Creature — Sliver :mythic:
Spells and abilities your opponents control can’t cause you to sacrifice Sliver creatures.
Whenever a Sliver creature leaves the battlefield, each opponent sacrifices a permanent.
The swarm has incomprehensible rules, but it is clear revenge is a part of the sliver law.
Here the part that can be abused is the "leaves the battlefield" trigger as blinking, returning to hand, sacrificing will activate.
Post by Jéské Couriano on Oct 14, 2018 0:38:37 GMT
Communing ) Convoke started as the Selesnya mechanic in the original Ravnica set, which is why it's primarily been in white and green (which are, not coincidentally, also the most spiritual and collectivist colours).
Peace ) I would call this too aggressively costed, especially given a Sliver deck's primary goal is to flood the board with Slivers. Even with the untapped limitation, all you'd need is some cheap way to make Sliver tokens and the "untapped" bit becomes meaningless, as the cost becomes far too prohibitive.
Lawful ) My concerns in re repeatable bounce and the lack of spells that force an opponent to sacrifice a permanent are still relevant here.