Haste
{T}, Sacrifice Pyrote Entity: It deals 1 damage to any target.

Whenever you amp it up, Pyrote Technician deals 2 damage to each opponent.

Each creature you control gets +2/+1 as long as you control two or more other creatures with the same name as it.
{3}{C}, {T}: Create a token that's a copy of target creature you control.

Flying, deathtouch, haste

Quantum Skycity enters tapped.
{T}: Add {W} or {U}.
{T}, Discard another card named Quantum Skycity: Draw a card.

Quell Dissent deals 3 damage to target creature. If that creature is legendary and/or a Rebel, Quell Dissent deals 5 damage to it instead.

Menace
Whenever another creature you control with menace attacks, create a token that's a copy of that creature that's tapped and attacking. Exile that token at the beginning of the next end step.

Up to two target creatures can't block this turn. Create an X/1 red Ox creature token with trample and haste, where X is the total power of those creatures. Exile that token at the beginning of the next end step.

Solidarity
{1}{R}: Choose a creature type. Ragecloak Shifter gets +2/+0 and becomes that type in addition to its other types until end of turn.

Choose a creature type. Create a 1/1 red creature token with haste of the chosen type.
Choose a creature type. Create a 1/1 green creature token with trample of the chosen type.

Enchant creature
Enchanted creature has menace and “Whenever this creature deals combat damage to a player, create a Treasure token.”

Choose one —
• Up to two target creatures get +2/+1 and gain first strike until end of turn.
• Create two 2/1 red Soldier creature tokens.

When Rallying the Revolutionaries enters, draw a card.
Activated abilities of creatures you control cost up to {2} less to activate. This effect can't reduce the mana in that cost to less than one mana.

Target creature you control deals damage equal to its power to target creature you don't control. If the creature you control has trample, excess damage is dealt to that creature's controller instead.

Target creature you control gets +1/+1 until end of turn. Prevent all combat damage that other creatures would deal this turn.

When Rano's Slopeguard enters, you may exile cards from the top of your library until you exile a nonland card with mana value 2 or less, then put the rest on the bottom in a random order. You may cast the exiled card this turn.

Trample, ward {3}
Other Yetis you control get +1/+1.
At the beginning of combat on your turn, if you've spent at least five mana to cast spells this turn, create a 3/3 green Yeti creature token with trample.

Rapturous Festival enters tapped.
{T}: Add {G} or {W}.
{T}, Discard another card named Rapturous Festival: Draw a card.

Menace
Creatures you control get +1/+0 if you've cast a spell that targeted Rathomar Forerunner this turn.

Whenever you cast a spell that targets Rathomar Herder, choose one. If Rathomar Herder is attacking, you may choose both instead.
• Create a 1/1 white Human creature token.
• Creatures you control get +1/+0 until end of turn.

Haste
Whenever you cast a spell that targets Rathomar Raider, target creature can't block this turn.

Rattling Soundvein enters tapped.
When Rattling Soundvein enters, you may pay 1 life. If you do, add one mana of any color other than red.
{T}: Add {R}.

Raze the Streets deals 4 damage to any target.
{2}, Discard Raze the Streets: Search your library for a basic Mountain card, reveal it, put it into your hand, then shuffle.

When Reaching Remnant enters, it deals 4 damage to target creature with flying you don't control.
Spellcharge 3

{T}: Add one mana of any type.
{T}, Sacrifice two permanents named Reactor Sphere: Draw three cards.