First strike, vigilance
Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature.

Tap two untapped creatures you control: Tap target creature.

Flying
Whenever Ganax or another Dragon you control enters, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")
Choose a Background (You can have a Background as a second commander.)

, : Target player mills two cards.

As an additional cost to cast this spell, return a creature you control to its owner's hand.
Counter target spell.

Enchant creature
Enchanted creature gets +3/+3 and has trample.
: Regenerate enchanted creature.

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.
Your opponents can't cast spells with the same name as the exiled card.

Destroy target artifact.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Lifelink
When this creature enters, put a -1/-1 counter on target creature you control.

: Monstrosity X. (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.)
As long as this creature is monstrous, it has trample.

Whenever another creature dies, or a creature card is put into a graveyard from anywhere other than the battlefield, or a creature card leaves your graveyard, Syr Konrad deals 1 damage to each opponent.
: Each player mills a card. (They each put the top card of their library into their graveyard.)

Whenever this creature deals combat damage to a player, if you control a Swamp, you may have that player discard a card.

Whenever a player casts a spell, that player returns a land they control to its owner's hand.

Each creature you control assigns combat damage equal to its toughness rather than its power.

Whenever this creature deals damage to a creature, put a +1/+1 counter on this creature.
: Regenerate this creature.
: This creature becomes the color of your choice until end of turn.

Target attacking creature gets +X/+0 until end of turn.
Draw a card at the beginning of the next turn's upkeep.

All Sliver creatures get +1/+0.

Protection from creatures

Cumulative upkeep—Put two cards from a single graveyard on the bottom of their owner's library. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

, , Choose flying, first strike, trample, or shadow: Until end of turn, target creature with the chosen ability loses it and another target creature gains it.

Volcanic Geyser deals X damage to any target.

Spend only black mana on X.
Consume Spirit deals X damage to any target and you gain X life.

Renata's power is equal to your devotion to green. (Each in the mana costs of permanents you control counts toward your devotion to green.)
Each other creature you control enters with an additional +1/+1 counter on it.

Draw a card. Scry 2.

Other black creatures you control get +1/+1.
, : Another target black creature you control gains deathtouch until end of turn. (Any amount of damage it deals to a creature is enough to destroy it.)

You may have this creature enter as a copy of any creature card in a graveyard.

Vigilance
Lieutenant — At the beginning of combat on your turn, if you control your commander, prevent all combat damage that would be dealt to creatures you control this turn. Other creatures you control gain vigilance until end of turn.

Target creature you control gets +X/+0 and gains first strike and trample until end of turn.

Flying
Revenant's power and toughness are each equal to the number of creature cards in your graveyard.

Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.

Choose one —
• Each opponent sacrifices a nontoken creature of their choice.
• Each opponent sacrifices a creature token of their choice.
• Each opponent sacrifices a planeswalker of their choice.

This spell costs less to cast if you control a creature with power 4 or greater.
Change the target of target spell or ability with a single target.

Flying
At the beginning of your upkeep, draw a card unless target opponent sacrifices a creature of their choice or pays 3 life.

Creatures you control get +0/+1.
Sacrifice this enchantment: Return target creature to its owner's hand.

: You may tap or untap another target permanent.
Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Whenever an opponent discards a card, that player loses 2 life.