Wed already seen treasure-generating artifacts along the lines of Goldvein Pick and Prying Blade, but nothing compares to the sheer value of The Reaver Cleaver
During your next turn, this Pokmon can't attack
And that's a common situation - Ancient Tomb, Guildless Commons, or Temple of the False God can also tap for 2 mana
Sorcery Solphim, Mayhem Dominus If a source you control would deal noncombat damage to an opponent or a permanent an opponent controls, it deals double that damage to that player or permanent instead
All your favorite Ajani's Pridemate variants, Aerith Gainsborough oh, and that pesky combo of Aetherflux Reservoir with Myr Welder, too
Which means that if we can find a similar effect that's slightly less good that can also be cast with only a bunch of red pips, Savage BeatingSavage Beating is out