Tainted Observer

Cards similar to Tainted Observer:

Agate Instigator

Creature — Lizard Rogue (1/3)

Offspring (You may pay an additional as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.)
Whenever another creature you control enters, this creature deals 1 damage to each opponent.

9 /10

~$17

Emiel the Blessed

Legendary Creature — Unicorn (4/4)

: Exile another target creature you control, then return it to the battlefield under its owner's control.
Whenever another creature you control enters, you may pay . If you do, put a +1/+1 counter on it. If it's a Unicorn, put two +1/+1 counters on it instead. ( can be paid with either or .)

9.3 /10

$3.95

Guide of Souls

Creature — Human Cleric (1/2)

Whenever another creature you control enters, you gain 1 life and get (an energy counter).
Whenever you attack, you may pay . When you do, put two +1/+1 counters and a flying counter on target attacking creature. It becomes an Angel in addition to its other types.

8.7 /10

$3.34

Halana, Kessig Ranger

Legendary Creature — Human Archer Ranger (3/4)

Reach
Whenever another creature you control enters, you may pay . When you do, that creature deals damage equal to its power to target creature.
Partner (You can have two commanders if both have partner.)

7.7 /10

$0.18

Jugan Defends the Temple // Remnant of the Rising Star

Enchantment — Saga // Enchantment Creature — Dragon Spirit (0/0)

(As this Saga enters and after your draw step, add a lore counter.)
I — Create a 1/1 green Human Monk creature token with ": Add ."
II — Put a +1/+1 counter on each of up to two target creatures.
III — Exile this Saga, then return it to the battlefield transformed under your control.

Remnant of the Rising Star

Flying
Whenever another creature you control enters, you may pay . When you do, put X +1/+1 counters on that creature.
As long as you control five or more modified creatures, Remnant of the Rising Star gets +5/+5 and has trample. (Equipment, Auras you control, and counters are modifications.)

8.7 /10

$2.71

Railway Brawler

Creature — Rhino Warrior (5/5)

Reach, trample
Whenever another creature you control enters, put X +1/+1 counters on it, where X is its power.
Plot (You may pay and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

8.8 /10

$7.34

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