Yurlok of Scorch Thrash

Vigilance
A player losing unspent mana causes that player to lose that much life.
{1}, {T}: Each player adds {B}{R}{G}.

Nyxbloom Ancient

Trample
If you tap a permanent for mana, it produces three times as much of that mana instead.

At the beginning of each player's first main phase, that player adds {G}{G}.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced, and this enchantment deals 1 damage to the player.

Whenever a player taps a land for mana, this enchantment deals 1 damage to that player.

Untap this artifact during each other player's untap step.
{T}: A player of your choice adds {C}.

Equipped creature has "{3}, {Q}: This creature gets +2/+2 until end of turn." ({Q} is the untap symbol.)
Equip {0}

If you tap a permanent for mana, it produces twice as much of that mana instead.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
{T}: Add {B}, {R}, or {G}.

At the beginning of each player's end step, that player sacrifices an untapped land of their choice.

At the beginning of each player's end step, this enchantment deals X damage to that player, where X is the number of untapped lands they control.

{1}: Untap this artifact.
{2}, {T}: You gain 1 life.
{3}, {T}: Untap target creature.
{4}, {T}: Tap target creature.
{5}, {T}: Draw a card.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.