Pioneer / Post-Modern Era

Constellation — Whenever an enchantment enters the battlefield under your control, Triton Waverider gains flying until end of turn.

Undergrowth — When Moodmark Painter enters the battlefield, target creature gains menace and gets +X/+0 until end of turn, where X is the number of...

Flying Whenever you cycle or discard another card, put a -1/-1 counter on each creature your opponents control. Cycling {2} ({2}, Discard this card...

Riot (This creature enters the battlefield with your choice of a +1/+1 counter or haste.)

Reach

Trample Lethal damage dealt to creatures you control is determined by their power rather than their toughness.

When Garrison Cat dies, create a 1/1 white Human Soldier creature token.

Target creature gets +3/+3 and gains reach until end of turn.

Gatebreaker Ram gets +1/+1 for each Gate you control. As long as you control two or more Gates, Gatebreaker Ram has vigilance and trample.

Underworld Charger can't block. Escape—{4}{B}, Exile three other cards from your graveyard. (You may cast this card from your graveyard for its es...

{1}, {T}: Blisterspit Gremlin deals 1 damage to each opponent. Whenever you cast a noncreature spell, untap Blisterspit Gremlin.

{1}{B}: Search your library for a card named Whisper Squad, put it onto the battlefield tapped, then shuffle your library.

Flash Adaptive Shimmerer enters the battlefield with three +1/+1 counters on it.

When Blight-Breath Catoblepas enters the battlefield, target creature an opponent controls gets -X/-X until end of turn, where X is your devotion t...

{T}: Add {C}. {4}, {T}: Remove target attacking or blocking creature from combat.

Target opponent reveals their hand. You choose a nonland card from it or a card from their graveyard. Exile that card. You lose 1 life.

{G}{W}: Bronzehide Lion gains indestructible until end of turn. When Bronzehide Lion dies, return it to the battlefield. It's an Aura enchantment w...

Jungle Hollow enters the battlefield tapped. When Jungle Hollow enters the battlefield, you gain 1 life. {T}: Add {B} or {G}.

Dismal Backwater enters the battlefield tapped. When Dismal Backwater enters the battlefield, you gain 1 life. {T}: Add {U} or {B}.

Blossoming Sands enters the battlefield tapped. When Blossoming Sands enters the battlefield, you gain 1 life. {T}: Add {G} or {W}.

Bloodfell Caves enters the battlefield tapped. When Bloodfell Caves enters the battlefield, you gain 1 life. {T}: Add {B} or {R}.

{T}, Sacrifice Tormod's Crypt: Exile all cards from target player's graveyard.

As an additional cost to cast this spell, discard a card. Protection from planeswalkers {1}: Sparkhunter Masticore deals 1 damage to target planesw...

Constellation — Whenever an enchantment enters the battlefield under your control, you may have Protean Thaumaturge become a copy of another target...