Creatures can't attack a player unless that player cast a spell or put a nontoken permanent onto the battlefield during their last turn.

Protection from red
Beasts of Bogardan gets +1/+1 as long as an opponent controls a nontoken white permanent.

, : Counter target activated ability from an artifact source. (Mana abilities can't be targeted.)

As an additional cost to cast this spell, sacrifice a creature.
Add X mana in any combination of and/or , where X is the sacrificed creature's converted mana cost.

Enchant creature
Enchanted creature has mountainwalk. (It can't be blocked as long as defending player controls a Mountain.)

, : Reveal the top card of your library. If it has the same name as a card in your graveyard, put it into your graveyard. Otherwise, draw a card.

Whenever Chub Toad blocks or becomes blocked, it gets +2/+2 until end of turn.

If Clergy of the Holy Nimbus would be destroyed, regenerate it.
: Clergy of the Holy Nimbus can't be regenerated this turn. Only any opponent may activate this ability.

Flying
, : Crimson Manticore deals 1 damage to target attacking or blocking creature.

Remove Demonic Attorney from your deck before playing if you're not playing for ante.
Each player antes the top card of their library.

When Devout Monk enters the battlefield, you gain 1 life.

At end of combat, put a paralyzation counter on each creature blocking or blocked by Dread Wight and tap those creatures. Each of those creatures doesn't untap during its controller's untap step for as long as it has a paralyzation counter on it. Each of those creatures gains ": Remove a paralyzation counter from this creature."

Tap target untapped creature you control. If you do, add an amount of equal to that creature's converted mana cost.

: Flowstone Salamander deals 1 damage to target creature blocking it.

, : You gain 1 life.

Rampage 2 (Whenever this creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it beyond the first.)

: Put a spore counter on target Fungus.

All Sliver creatures have "Whenever this creature is dealt damage, put a +1/+1 counter on it." (The damage is dealt before the counter is put on.)

Whenever Fungusaur is dealt damage, put a +1/+1 counter on it.