Cosmic Spider-Man

First strike, vigilance, trample

At the beginning of combat on your turn, another target Elemental you control gains myriad until end of turn. (Whenever it attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.)

Flying, first strike, vigilance, trample, lifelink

Enchanted creature gets +4/+4 and has flying, first strike, vigilance, trample, and lifelink.

Flying

At the beginning of combat on your turn, roll the party die and create a number of Treasure tokens equal to the result. (Your party consists of up to one of each of Cleric, Rogue, Warrior, and Wizard. If your party size is 1, the party die is a d4. It's a d8 for 2, a d12 for 3, and a d20 for 4.)

Haste

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

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

Legendary creatures you control get +X/+X, where X is the number of legendary creatures you control.

Whenever you cast a legendary spell from your hand, exile cards from the top of your library until you exile a legendary nonland card with lesser mana value. You may cast that card without paying its mana cost. Put the rest on the bottom of your library in a random order.

Flash

Flying, trample, haste

When Nira, Hellkite Duelist enters, the next time you would lose the game this turn, instead draw three cards and your life total becomes 5.