At the beginning of your upkeep, roll a six-sided die. If you a roll a 1, sacrifice Krazy Kow and it deals 3 damage to each creature and each player.

Target opponent loses 2 life for each Swamp you control. Last Stand deals damage to target creature equal to the number of Mountains you control. Create a 1/1 green Saproling creature token for each Forest you control. You gain 2 life for each Plains you control. Draw a card for each Island you control, then discard that many cards.

When Liege of the Hollows dies, each player may pay any amount of mana. Then each player creates a number of 1/1 green Squirrel creature tokens equal to the amount of mana they paid this way.

: Counter target black spell.

Lightning Blast deals 4 damage to any target.

Flying
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
: Lightning Dragon gets +1/+0 until end of turn.

Counter target spell with converted mana cost 3 or less. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

At the beginning of your end step, if Mad Dog didn't attack or come under your control this turn, sacrifice it.

When Maggot Carrier enters the battlefield, each player loses 1 life.

: Put a pressure counter on Magma Mine.
, Sacrifice Magma Mine: It deals damage equal to the number of pressure counters on it to any target.

You and target opponent each flip a coin. Mana Clash deals 1 damage to each player whose coin comes up tails. Repeat this process until both players' coins come up heads on the same flip.

At the beginning of your upkeep, flip a coin. If you lose the flip, Mana Crypt deals 3 damage to you.
: Add .

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

When Marker Beetles dies, target creature gets +1/+1 until end of turn.
, Sacrifice Marker Beetles: Draw a card.

Whenever Marsh Viper deals damage to a player, that player gets two poison counters. (A player with ten or more poison counters loses the game.)

Trample, haste
When Menacing Ogre enters the battlefield, each player secretly chooses a number. Then those numbers are revealed. Each player with the highest number loses that much life. If you are one of those players, put two +1/+1 counters on Menacing Ogre.

: Draw a card, then discard a card.

Put target permanent an opponent controls on top of its owner's library. That opponent may put an artifact, creature, enchantment, or land card from their hand onto the battlefield.

Target creature gets +7/+7 until end of turn.

When Mind Maggots enters the battlefield, discard any number of creature cards. For each card discarded this way, put two +1/+1 counters on Mind Maggots.