Whenever you amp it up, target creature can't block this turn.

Exile the top four cards of your library. You may play them until you play a card not exiled this way.

Whenever you amp it up, creatures you control get +1/+0 until end of turn.

Vigilance
At the beginning of combat on your turn, if you've spent at least five mana to cast spells this turn, put a +1/+1 counter on Encampment Sentinel.

This spell can't be countered.
First strike, haste
Whenever an opponent casts a spell during your turn, End of Mutations deals 5 damage to them.

{2}{G}: Endangered Scinok gets +1/+1 until end of turn. This ability costs {1} less to activate until end of turn.

When Energizing Static enters, target creature gets +3/+3 until end of turn. If that creature is an Elemental, it also gains trample until end of turn.

Put a +1/+1 counter on target creature you control. It gains hexproof until end of turn.

Enspirited Ore gets +1/+1 for each other artifact you control.
Tap three untapped artifacts you control: Enspirited Ore gains indestructible until end of turn.

{G}, Sacrifice Entangled Fossil: Target card in your graveyard gains surface until end of turn. The surface cost is equal to its mana cost.
Surface {4}{G}{G}. Entangled Fossil surfaces transformed.

Enchant creature
When Enter the Moshpit enters, create a 2/1 red Zombie creature token with menace.
Enchanted creature gets +2/+1 and has menace.

Enchant land
Enchanted land has “{T}: Add {G}{G}.”

Target creature gets +X/+0 and gains trample until end of turn.
Draw a card.

{1}{R}: Erupting Volcamel and up to one other target creature you control get +2/+0 until end of turn.
Whenever you activate a nonmana ability, if you've spent at least six mana to activate nonmana abilities this turn, Erupting Volcamel deals 2 damage to any target.

Target creature gets +X/+X until end of turn. It must be blocked each combat this turn if able.

{T}: Add {C}.
{2}, {T}: For each color among permanents you control, add one mana of that color.

Estrathian Gentrifiers's power is equal to the number of differently named lands you control.
Whenever Estrathian Gentrifiers enters or attacks, you may sacrifice a basic land. If you do, search your library for a land card, put it onto the battlefield, then shuffle.

Enchant creature with another Aura attached to it
Enchanted creature gets +3/+3 and has trample, vigilance, and reach.

When Everpresent Rot enters, create a 1/1 green Saproling creature token, surveil 1, then you gain 1 life.
When one or more permanent cards leave your graveyard, return Everpresent Rot to its owner's hand.

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Deathtouch
Other Gorgons, Snakes, and Basilisks you control get +1/+1.
Whenever a creature with deathtouch you control deals combat damage to a player or planeswalker, create a Treasure token.

{3}{R}: Exile the top card of your library. You may play that card until the end of your next turn.
{7}{R}: Exotic Transformer deals damage equal to its power to any target.

Target creature gains haste until end of turn.
Draw a card.

Trample, haste
Decayed

Explosive Redemption deals 4 damage to target creature. When that creature dies this turn, return it to the battlefield under your control. It gains haste. Sacrifice it at end of turn.