cards with miracle mtg Worker Precon Upgrade Guide Whenever a creature you control with a +1/+1 counter on it dies MTG Duskmourn - Miracle Worker

[19-039R] Emerald Weapon If Emerald Weapon has moved from the Break Zone when the auto-ability is resolved, such as by being removed from the game, Emerald Weapon does not enter the field

I think my favorite has to be Metallic Mimic, though

Samurai Katana Mana Value: 2R Rarity: Uncommon Type: Artifact Equipment Card Text: Choose a Job

For four mana, this enchantment doubles the number of +1/+1, spacecraft, and planet counters that would be placed on your stuff

Honorable Mention: Impulse Magic slang sure can get confusing sometimes

The biggest issue with making slivers in a Standard set is that it needs to have a heavy sliver theme to make them playable, and the design space for slivers is relatively narrow