Mill a card. Put a +1/+1 counter on up to one target creature. Exile up to one target card from a graveyard. You gain 1 life.
Flashback {1}{G}

Choose two —
• Target player may scry 3.
• Return target permanent you control to its owner's hand.
• You may tap or untap target creature.

Target creature you control gets +1/+0 and gains haste until end of turn.
Draw a card.

Draw a card. If you've amped it up this turn, creatures your opponents control get -1/-0 until end of turn.

When Rib Collector enters, if it wandered, return target creature card from your graveyard to your hand.
Wander—{1}{B}, Sacrifice another creature.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. Scry 1.

Target creature you control gains deathtouch until end of turn. When that creature dies this turn, create a 2/2 black Zombie creature token.

Target creature gets +2/+0 and gains first strike until end of turn. It gets an additional +1/+0 until end of turn for each time you've amped it up this turn.

Amity — Whenever you attack with Rollephant and exactly one other creature, Rollephant gets +2/+2 until end of turn.

Whenever Rooftop Slink deals combat damage to a player, you may have each player discard a card.
Cybersoul {3}{B}

Enchant creature
Enchanted creature gets -1/-1.
Sacrifice an artifact: Destroy enchanted creature. Activate only as a sorcery.

Surface {U}. Scuttling Cicada surfaces transformed.

Whenever a basic land you control enters, put a +1/+1 counter on Seeker of New Horizons. If you control seven or more lands, bless that land.

{B}, Sacrifice Serrated Fossil: Choose a nonland card name. Target player reveals their hand and discards a card with that name if able. Activate only as a sorcery.
Surface {3}{B}{B}. Serrated Fossil surfaces transformed.

{4}{B}: You draw a card and you lose 1 life. This ability costs {1} less to activate for each other Shrine you control. Activate only once each turn.

Exile target creature or enchantment if its mana value is less than or equal to the number of spells named Singularity you've cast this game.

Flash
Flying
When Sleeper Strix enters, tap up to one target creature.
You may look at an additional card each time you surveil.

When Slumbering Grove enters, search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Spellcharge 8

When Sparks of a Revolution enters, create a 1/1 colorless Soldier creature token. It gains haste until end of turn.
Three or more sources you controlled dealt damage this turn.
A source you controlled dealt 3 or more damage this turn.

Counter target activated or triggered ability from a nonland source. If a creature's ability is countered this way, you may pay {1}{C}. If you do, exile that creature.

Whenever a Ruin you control becomes spellcharged, put a +1/+1 counter on Speaker of the Forebears.
Sacrifice Speaker of the Forebears: Add an amount of {R} equal to the number of +1/+1 counters on it.

Whenever you amp it up, target creature gets +1/+1 until end of turn. If this is the second time this ability has resolved this turn, put a +1/+1 counter on that creature instead.

Enchant creature
When Stasis Chamber enters, if you control a creature with vigilance, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Put a haste counter on up to one target creature.
Draw a card.

Target creature gains flying until end of turn. Draw a card.