Chittering Doom

Whenever you roll a 4 or higher on a die, create a 1/1 green Squirrel creature token.

Wall of Fortune

Defender
You may tap an untapped Wall you control to have any player reroll a die that player rolled.

Willing Test Subject

Reach
Whenever you roll a 4 or higher on a die, put a +1/+1 counter on this creature.
{6}: Roll a six-sided die.

Mother Kangaroo

When this creature enters, roll a six-sided die. Put a number of +1/+1 counters on this creature equal to the result.

Amaranthine Wall

Defender
{2}: This creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Socketed Sprocketer

{T}: Uninstall all results from this creature, then roll a six-sided die. Install the result on this creature. (Put the die on this creature.)
You may uninstall a result from this creature to use it for a die you rolled.
Uninstall a 6 from this creature: Draw a card.

Krark's Other Thumb

If you would roll a die, instead roll two of those dice and ignore one of those results.

Elvish Impersonators

As this creature enters, roll a six-sided die twice. Its base power becomes the first result and its base toughness becomes the second result.

Mad Science Fair Project

{T}: Roll a six-sided die. On a 3 or lower, target player adds {C}. Otherwise, that player adds one mana of any color they choose.

Multi-Headed

At the beginning of each end step, if you rolled a die this turn,
Augment {4}{G} ({4}{G}, Reveal this card from your hand: Combine it with target host. Augment only as a sorcery.)

Lobe Lobber

Equipped creature has "{T}: This creature deals 1 damage to target player or planeswalker. Roll a six-sided die. On a 5 or higher, untap it."
Equip {2}

Atomwheel Acrobats

Whenever you roll a 1 or 2, put that many +1/+1 counters on this creature.
{2}{G}: Roll a six-sided die.

Strength-Testing Hammer

Whenever equipped creature attacks, roll a six-sided die. That creature gets +X/+0 until end of turn, where X is the result. Then if it has the greatest power or is tied for greatest power among creatures on the battlefield, draw a card.
Equip {3}

As Luck Would Have It

Hexproof
Whenever you roll a die, put a number of luck counters on this enchantment equal to the result. Then if there are 100 or more luck counters on this enchantment, you win the game. (Count both rolls if you reroll a die.)

Steel Squirrel

Whenever you roll a 5 or higher on a die, this creature gets +X/+X until end of turn, where X is the result.
{6}: Roll a six-sided die.

Resolute Veggiesaur

Trample
Whenever you roll your third die each turn, put a +1/+1 counter on this creature.

Glyph of Reincarnation

Cast this spell only after combat.
Destroy all creatures that were blocked by target Wall this turn. They can't be regenerated. For each creature that died this way, put a creature card from the graveyard of the player who controlled that creature the last time it became blocked by that Wall onto the battlefield under its owner's control.

Ground Pounder

{3}{G}: Roll a six-sided die. This creature gets +X/+X until end of turn, where X is the result.
Whenever you roll a 5 or higher on a die, this creature gains trample until end of turn.

Pippa, Duchess of Dice

{2}{G}, {T}: Roll a six-sided die. It becomes a green Die creature token with power and toughness each equal to its result.
{2}{U}, {T}: Reroll any die. (Activate only any time it makes sense.)