An opponent chooses one —
• You draw three cards at the beginning of the next turn's upkeep.
• You search your library for a card, put that card into your hand, then shuffle your library.

Artifact creatures you control gain flying until end of turn.

As Mangara's Equity enters the battlefield, choose black or red.
At the beginning of your upkeep, sacrifice Mangara's Equity unless you pay .
Whenever a creature of the chosen color deals damage to you or a white creature you control, Mangara's Equity deals that much damage to that creature.

As an additional cost to cast this spell, sacrifice a green creature.
Search your library for a green creature card and put it onto the battlefield. Then shuffle your library.

Search your library for a Forest card and put that card onto the battlefield. Then shuffle your library.

Target artifact, creature, or land phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before its controller untaps during their next untap step.)

Sandstone Needle enters the battlefield tapped with two depletion counters on it.
, Remove a depletion counter from Sandstone Needle: Add . If there are no depletion counters on Sandstone Needle, sacrifice it.

Defender
Whenever Shield Sphere blocks, put a -0/-1 counter on it.

Target player reveals their hand. For each blue instant card revealed this way, that player discards that card unless they pay 4 life.

: Choose target opponent. Regenerate Soldevi Sentry. When it regenerates this way, that player may draw a card.

Soul Shred deals 3 damage to target nonblack creature. You gain 3 life.

: Regenerate Spiny Starfish.
At the beginning of each end step, if Spiny Starfish regenerated this turn, create a 0/1 blue Starfish creature token for each time it regenerated this turn.

, : Creatures you control get +2/+2 until end of turn.
, : Return target creature to its owner's hand.

At the beginning of each player's upkeep, that player chooses artifact, creature, land, or non-Aura enchantment. All nontoken permanents of that type phase out. (While they're phased out, they're treated as though they don't exist. Each one phases in before its controller untaps during their next untap step.)

Put target creature on top of its owner's library.

, , Discard a card: You may tap or untap target artifact, creature, or land.

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)
: Target creature gains forestwalk until end of turn.

Defender (This creature can't attack.)
, : Create a 0/1 blue Plant Wall creature token with defender named Kelp.