There's no "rules" exactly, but the spirit of the game is to use words that exist on cards as rules text basically. So useless common used "stimulate" a few posts up which doesn't exist on cards anywhere so that doesn't really work.

Oh dear, I thought it was to use words that were in the Comprehensive Rules. So I used "tombstone" because "tombstone icon" is a thing in the CR, but of course it doesn't appear on any rules text and never will.

hmmm yeah that works too

Yeah, the original rule was "words I to comprehensive rules", but that has caused some discussion in the past as well. If I ha had started a new thread, I would have made the rule what Lily said. But by the rules as stated, you are fine.

Screw the Rules, I Have Money
Power (R)
You may pay the judge for the change in the rules.

The One Ring
Legendary Artifact - Equipment (M)
You are not equipped to deal with the power it takes to control this artifact of the Shadow.
At the beginning of each upkeep, choose one -
* You must equip The One Ring if able.
* You must destroy The One Ring if able.
Equipped creature has hexproof, can't be blocked and has Illusions of Grandeur.
Equip - Sacrifice a creature that is paired with another creature.

Unnatural Axe
Artifact - Equipment (U)
Equipped creature, devoid of prowess and vigilance, desroys all it can reach.
Equip Unnatural Axe as a tribute to the most ferocious Warriors.

Grub
Life Source (C)
Devour target creature. You gain calories equal to it's nutrition value.

Booby Traps of the Totem's Cave —
Instant — Trap
Whenever a player exchanges Sand for a historic artifact this turn, unleash the horrors of the Lair. If the player doesn't die, he or she may exchange the historic artifact for Gold.

Crowning
Enchantment - Aura (R)
Enchant creature
Enchanted creature is a Monarch.
The battlefield is one of it's Domains.
Your creatures are some of it's Serfs.
As a Monarch, it's one with his land, and all it's Citizens.

Scholarly Knight —
Creature — Human Knight Advisor
Lifetouch, seventh strike
When Scholarly Knight enters the battlefield, manifest your indestructible power. Then, if the number of cards in your hand is greater than this creature's toughness, inspire the top card of your library to scry when you reveal it.
"What I learned on the battlefield helps me in my study, and what I learn from my books, I act on with my blade."
1/3

A Boy's Story -
Enchantment
At the end of your saga, ascend as a hero.

It's a Trap
Instant - Trap
Gotcha!
The Rebel vehilcles and bandings are put to the graveyards of revolt.
The damage to the power of black Lord is prevented.

Instant
Instant
Instant
"Instant"

Yawgmoth's Declaration -
Enchantment
Urza's bottom is Mine and will always be Mine. Deal with it.

That's alright, we only need the head

Rezoning Ordinance —
Instant Sorcery
Untap your library, shuffle your battlefield, draw your hand, and graveyard your exile.

Your Potential
Enchantment
As long as Your Potential is untapped, you cannot cast epic spells.
: The next spell you cast is epic.

This one is actually a real card

Your Potential?

I mean the effect is nearly legal