changeling mtg cards War-Spike [Modern Masters] Champion a creature (When this enters the battlefield MTGNexus - Envious Changeling

Don't see this being a thing in any sort of cube setting though

What does Zombie Ogre do

It shows how little the designers understood the game they had created that this card - which lets you draw three cards for one mana - was assumed to be roughly as powerful as Giant Growth, Lightning Bolt, Dark Ritual, or (of all things) Healing Salve

Put Erebos next to a free sacrifice outlet such as Viscera Seer or Phyrexian Altar and there is even more value

1 | Bludgeon Brawl $0.40 Mana Value: 2R Rarity: Rare Card Text: Each noncreature, non-Equipment artifact is an Equipment with equip X and Equipped creature gets +X/+0, where X is that artifacts mana value

At that point, youre talking about an entire strategy revolving around infinite resourcessomething that should already fall under the umbrella of a Rule 0 discussion