Card Codex

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17 May 2024: Card library updated.

Professor's Warning

B · Instant

Choose one — • Put a +1/+1 counter on target creature. • Target creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Similar cards

Color identity:
NameManaTypeText
Llanowar Cavalry 2GCreature — Human Soldier {W}: Llanowar Cavalry gains vigilance until end of turn. 1/4
Hangarback Walker XXArtifact Creature — Construct Hangarback Walker enters the battlefield with X +1/+1 counters on it. When Hangarback Walker dies, create a 1/1 colorless Thopter artifact creature token with flying for each +1/+1 counter on Hangarback Walker. {1}, {T}: Put a +1/+1 counter on Hangarback Walker. 0/0
Twinferno 1RInstant Choose one — * When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy. * Target creature you control gains double strike until end of turn.
Makeshift Battalion 2WCreature — Human Soldier Battalion — Whenever Makeshift Battalion and at least two other creatures attack, put a +1/+1 counter on Makeshift Battalion. 3/2
Kalonian Hydra 3GGCreature — Hydra Trample Kalonian Hydra enters the battlefield with four +1/+1 counters on it. Whenever Kalonian Hydra attacks, double the number of +1/+1 counters on each creature you control. 0/0
Clockwork Avian 5Artifact Creature — Bird Flying Clockwork Avian enters the battlefield with four +1/+0 counters on it. At end of combat, if Clockwork Avian attacked or blocked this combat, remove a +1/+0 counter from it. {X}, {T}: Put up to X +1/+0 counters on Clockwork Avian. This ability can't cause the total number of +1/+0 counters on Clockwork Avian to be greater than four. Activate only during your upkeep. 0/4
Slumbering Dragon RCreature — Dragon Flying Slumbering Dragon can't attack or block unless it has five or more +1/+1 counters on it. Whenever a creature attacks you or a planeswalker you control, put a +1/+1 counter on Slumbering Dragon. 3/3
Bloatfly Swarm 3BCreature — Insect Mutant Flying Bloatfly Swarm enters the battlefield with five +1/+1 counters on it. If damage would be dealt to Bloatfly Swarm while it has a +1/+1 counter on it, prevent that damage, remove that many +1/+1 counters from it, then give each player a rad counter for each +1/+1 counter removed this way. 0/0
Wurmskin Forger 5GGCreature — Elf Warrior When Wurmskin Forger enters the battlefield, distribute three +1/+1 counters among one, two, or three target creatures. 2/2
Ring of Valkas 2Artifact — Equipment Equipped creature has haste. (It can attack and {T} no matter when it came under your control.) At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's red. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
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