Astral Arena

When you encounter Spatial Merging, reveal cards from the top of your planar deck until you reveal two plane cards. Simultaneously planeswalk to both of them. Put all other cards revealed this way on the bottom of your planar deck in any order.

All lands have "T: Add one mana of any color." Whenever chaos ensues, reveal the top three cards of your library. Put all land cards revealed this way into your hand and the rest on the bottom of your library in any order.

At the beginning of your end step, mill seven cards. Then return a card at random from your graveyard to your hand. Whenever chaos ensues, return target card from your graveyard to your hand.

When you encounter Planewide Disaster, destroy all creatures. (Then planeswalk away from this phenomenon.)

If an effect would create one or more tokens, it creates twice that many of those tokens instead. If an effect would put one or more counters on a permanent, it puts twice that many of those counters on that permanent instead. Whenever chaos ensues, until end of turn, whenever you tap a land for mana, add one mana of any type that land produced.

All creatures have vigilance. Whenever chaos ensues, creatures you control gain indestructible until end of turn.

Creatures with flying get +2/+0. Creatures without flying get -2/-0. Whenever chaos ensues, target creature gains flying until end of turn.

When you encounter Mutual Epiphany, each player draws four cards. (Then planeswalk away from this phenomenon.)