Lands, utility creatures, artifacts, enchantments all fair game
Once Rakdos is active, flood the board with Eldrazi and huge creatures for free or at a huge discount
Heres an example of the kind of deck that got Mind Twist banned: Creatures (2) Lands (21) Spells (37) 4 Mana Drain 2 Counterspell 4 Swords to Plowshares 1 Sol Ring 1 Regrowth 1 Mind Twist 1 Demonic Tutor 1 Braingeyser 1 Time Walk 1 Ancestral Recall 2 Red Elemental Blast 1 Jayemdae Tome 2 Disrupting Scepter 4 Disenchant 1 Recall 2 Moat 1 Mirror Universe 1 Timetwister 1 Black Lotus 1 Mox Emerald 1 Mox Jet 1 Mox Pearl 1 Mox Ruby 1 Mox Sapphire Thats right, one of the most famous, most influential decks of all-time, The Deck, was a Mind Twist deck until Mind Twist was banned
Back to 1993 and 1994, when two cards were printed that I'd argue were the original "flip cards." These didn't transform or have modality
Best MTG Counter cards Chalice of the Void (Counterspells/Counters Artifact) [c]Chalice of the Void[/c] uses both types of Magic counters counterspells and counter markers