You are a Flagbearer.
While choosing targets as part of casting a spell or activating an ability, your opponents must choose at least one Flagbearer if able.

Whenever a player plays a spell that counters a spell that has been played or a player plays a spell that comes into play with counters, that player may counter the next spell played or put an additional counter on a permanent that has already been played, but not countered.

Enchant creature or planeswalker you don't control
When this enchantment enters, conjure a card named Soldiers of the Watch onto the battlefield.
Enchanted permanent can't attack or block, and its activated abilities can't be activated.

: Target permanent's artist becomes the artist of your choice until end of turn.

Green creatures you control get +0/+2.

When this creature enters, creatures you control get +1/+1 until end of turn.

All creatures lose flying and islandwalk.

When this creature enters, create a 1/1 colorless Gnome artifact creature token.

Protection from modified creatures (Modified creatures have a power, toughness, or ability different than their printed versions.)
At the beginning of each player's end step, you may put a +1/+1 counter on target creature that player controls.

Mythweaver Poq's power and toughness are each equal to the number of lands you control.
Whenever one or more nontoken lands enter under your control, for each of them, conjure a duplicate of it onto the battlefield. This ability triggers only once each turn.

Enchant creature
This Aura enters with three net counters on it.
Enchanted creature doesn't untap during its controller's untap step if this Aura has a net counter on it.
Pay enchanted creature's mana cost: Remove a net counter from this Aura. Only the controller of the enchanted creature may activate this ability.

Choose two —
• Draw a card from an opponent's library.
• Copy target instant or sorcery spell. You may choose new targets for the copy.
• Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1.
• Create a 1/1 colorless Gnome artifact creature token.

Whenever a player casts a spell, counter it unless that player pays .

At the beginning of your upkeep, Halfdane's base power and toughness become equal to the power and toughness of target creature other than Halfdane until the end of your next upkeep.

When this creature specializes, remove all study counters from it. When you do, put target creature card with mana value less than or equal to the number of study counters removed this way from a graveyard onto the battlefield under your control.
: Draw a card, then discard a card.

, Growl: Regenerate this creature.

Flying
Spells cast by players wearing at least one item of women's clothing cost less to cast. (You can define women's clothing as you see fit. Be reasonable.)

Flash
When this creature enters, return target nonland permanent an opponent controls to its owner's hand. It perpetually gains "This spell costs more to cast."

Destroy all black creatures.

Trample
Other creatures you control get +1/+1 and have trample.
When Lukamina, Bear Form dies, it unspecializes. If it unspecializes this way, return it to the battlefield tapped.

: Target attacking creature has base power 0 until end of turn.

0: Create a 1/1 white Cat creature token with ": Put a loyalty counter on each planeswalker you control."
−1: Look at the top six cards of your library. You may reveal a planeswalker or basic Plains card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
−8: Create ten Scryb Sprites tokens. (They're 1/1 Faerie creatures with flying.)
Worzel, the Protector can be your commander.

, Pay 2 life: Add .
You may cast spells from your graveyard. Only mana produced by abilities that caused you to lose life may be spent to cast spells this way. (Damage causes loss of life.)
If a card would be put into your graveyard from anywhere, exile it instead.

Whenever you augment, enchant, or mutate a creature you control, draw a card.
: Add , , , , or .

: You may put a Faerie permanent card from your hand onto the battlefield.
: Target green creature gains protection from black until end of turn.

Sumala Rumblers's power is equal to the number of creatures you control.
Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

At the beginning of your upkeep, this creature deals 1 damage to you.

Whenever you cast a spell, you may have target player mill X cards, where X is the number of words in that spell's name.

: This creature's power becomes the toughness of target creature blocking or being blocked by this creature minus 1 until end of turn, and its toughness becomes 1 plus the power of that creature until end of turn.

At the beginning of your end step, conjure a card named Slimy Dualleech onto the battlefield if you control no Leeches. Otherwise, put a +1/+1 counter on each Leech you control.
, Sacrifice a creature: Add an amount of equal to the sacrificed creature's power.

Your maximum hand size is eleven.
Whenever Cecily, Haunted Mage attacks, you draw a card and you lose 1 life. Then if you have eleven or more cards in your hand, you may cast an instant or sorcery spell from your hand without paying its mana cost.
Partner—Friends forever (You can have two commanders if both have this ability.)

Flying, trample
At the beginning of your upkeep, exile the top card of your library and balance it on your body.
When a balanced card falls or touches another balanced card, sacrifice this creature.

Trample
As this creature enters, pay any amount of life. The amount you pay can't be more than the total number of white nontoken permanents your opponents control plus the total number of white cards in their graveyards.
Nameless Race's power and toughness are each equal to the life paid as it entered.

Whenever this creature deals damage to a player, choose an artifact, creature, or land you control. That player gains control of that permanent.

At the beginning of your upkeep, destroy another nonland permanent chosen at random, then put a number of +1/+1 counters on Yule Ooze equal to that permanent's converted mana cost.
, Eat some food: Regenerate Yule Ooze.

Whenever a player casts a spell without asking your permission while casting it, counter that spell.
When a player asks you permission to cast a spell and you refuse, counter that spell and sacrifice this enchantment.