Rush of Vitality | Instant | | Target creature gets +1/+0 and gains lifelink and indestructible until end of turn. (Damage dealt by that creature also causes its controller to gain that much life, and it can't be destroyed by damage or effects that say "destroy.") | Lindsey Look
Subtle Strike | Instant | | Choose one or both —
• Target creature gets -1/-1 until end of turn.
• Put a +1/+1 counter on target creature. | David Palumbo
Tidy Conclusion | Instant | | Destroy target creature. You gain 1 life for each artifact you control. | Bastien L. Deharme