This otter from Ikoria wasn't that bad in the command zone, but its companion restriction that requires a singleton deck is, well, not really a restriction in EDH
Some combos include: Fling - 2 CMC, Instant, requires the user to sacrifice a creature and then deals damage equal to its power to any target Greater Good - 4 CMC, Enchantment, makes the owner draw cards equal to the power of any creature sacrificed to trigger this effect Goblin Tunneler - 2 CMC, 1/1 Creature, it can be tapped to make target creature with power 2 or less unblockable for the turn, which would apply before combat Escape Tunnel - Land, it can be tapped and sacrificed alongside paying 2 colorless mana to make target creature unblockable for the turn How Final Fantasy's Jumbo Cactuar Breaks Magic: The Gathering There are many possible combos for Jumbo Cactuar to become a broken MTG card
Its nice that the adventure side represents common themes found in those colors, so sac decks will like the black one, while spellslinger decks will play the red one, and so on
Im still working the kinks out, but so far we have identified pretty solid numberical support for cards we picked out on the basis of I like these as specs in a pre-DPI world
Serra Ascendant, Resplendent Angel, and Archangel of Thune are all white creatures that see play in other formats and are huge casual hits