Sacrifice an Atog creature: Atogatog gets +X/+X until end of turn, where X is the sacrificed creature's power.

: Destroy target creature blocking or blocked by Cromat.

: Cromat gains flying until end of turn.

: Regenerate Cromat.

: Cromat gets +1/+1 until end of turn.

: Put Cromat on top of its owner's library.

Enchant land

: Enchanted land becomes a legendary 8/12 Spirit creature with trample until end of turn. It's still a land.

When enchanted land is put into a graveyard, you may return Genju of the Realm from your graveyard to your hand.

+1: Create a 3/3 Kavu creature token with trample that's all colors.

−3: Choose up to two target creatures. For each of them, put a number of +1/+1 counters on it equal to the number of colors it is.

−6: Return target multicolored card from your graveyard to your hand. If that card was all colors, draw a card and create two Treasure tokens.

Jared Carthalion can be your commander.

Haste

At the beginning of each player's upkeep, that player untaps Karona, False God and gains control of it.

Whenever Karona attacks, creatures of the creature type of your choice get +3/+3 until end of turn.

Flying, hexproof from multicolored

Whenever Niv-Mizzet, Guildpact deals combat damage to a player, it deals X damage to any target, target player draws X cards, and you gain X life, where X is the number of different color pairs among permanents you control that are exactly two colors.

Flying, trample

Whenever O-Kagachi, Vengeful Kami deals combat damage to a player, if that player attacked you during their last turn, exile target nonland permanent that player controls.

Protection from everything

If Progenitus would be put into a graveyard from anywhere, reveal Progenitus and shuffle it into its owner's library instead.

As Rukarumel, Biologist enters the battlefield, choose a creature type.

Slivers you control and nontoken creatures you control are the chosen type in addition to their other creature types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

, : Create a 1/1 colorless Sliver creature token.

Flying

: Search your library for a Dragon permanent card and put it into your graveyard. If you do, Scion of the Ur-Dragon becomes a copy of that card until end of turn. Then shuffle.

Sliver creatures you control have indestructible. (Damage and effects that say "destroy" don't destroy them.)

: Search your library for a Sliver card, reveal that card, put it into your hand, then shuffle.

: Gain control of target Sliver. (This effect lasts indefinitely.)

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Sliver spells you cast have cascade.

Eminence — As long as The Ur-Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost less to cast.

Flying

Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.

As long as there are four or more lore counters among Sagas you control, Tom Bombadil has hexproof and indestructible.

Whenever the final chapter ability of a Saga you control resolves, reveal cards from the top of your library until you reveal a Saga card. Put that card onto the battlefield and the rest on the bottom of your library in a random order. This ability triggers only once each turn.