502.2c Adding or removing first strike after the first combat damage step won’t prevent a creature from dealing combat damage or allow it to deal combat damage twice.
502.2d Multiple instances of first strike on the same creature are redundant.
502.3. Flanking
502.3a Flanking is a triggered ability that triggers during the declare blockers step. (See rule 309, “Declare Blockers Step.”) “Flanking” means “Whenever this creature becomes blocked by a creature without flanking, the blocking creature gets -1/-1 until end of turn.”
502.3b If a creature has multiple instances of flanking, each triggers separately.
502.4. Flying
502.4a Flying is an evasion ability.
502.4b A creature with flying can’t be blocked by creatures without flying. A creature with flying can block a creature with or without flying. (See rule 309, “Declare Blockers Step.”)
502.4c Multiple instances of flying on the same creature are redundant.
502.5. Haste
502.5a Haste is a static ability.
502.5b A creature with haste can attack or use activated abilities whose cost includes the tap symbol even if it hasn’t been controlled by its controller continuously since the beginning of his or her most recent turn. (See rule 212.3d.)
502.5c Multiple instances of haste on the same creature are redundant.
502.6. Landwalk
502.6a Landwalk and snow landwalk are generic terms; a card’s rules text will give a specific subtype or supertype (such as in “islandwalk,” “snow swampwalk,” or “legendary landwalk”).
502.6b Landwalk and snow landwalk are evasion abilities. A creature with landwalk is unblockable as long as the defending player controls at least one land with the specified subtype and/or supertype. (See rule 309, “Declare Blockers Step.”)
502.6c Snow landwalk is a special type of landwalk. A creature with snow landwalk is unblockable as long as the defending player controls at least one snow land with the specified subtype. If a player is allowed to choose any landwalk ability, that player may choose a snow landwalk ability. If an effect causes a permanent to lose all landwalk abilities, snow landwalk abilities are removed as well.
502.6d Landwalk or snow landwalk abilities don’t “cancel” one another.
Example: If a player controls a snow Forest, that player can’t block an attacking creature with snow forestwalk even if he or she also controls a creature with snow forestwalk.
502.6e Multiple instances of the same type of landwalk or snow landwalk on the same creature are redundant.
502.7. Protection
502.7a Protection is a static ability, written “Protection from [quality].” This quality is usually a color (as in “protection from black”) but can be any characteristic value. If the quality is a type, subtype, or supertype, the protection applies to sources that are permanents with that type, subtype, or supertype and to any sources not in play that are of that type, subtype, or supertype.
502.7b A permanent with protection can’t be targeted by spells with the stated quality and can’t be targeted by abilities from a source with the stated quality.
502.7c A permanent with protection can’t be enchanted by Auras that have the stated quality. Such Auras attached to the permanent with protection will be put into their owners’ graveyards as a state-based effect. (See rule 420, “State-Based Effects.”)
502.7d A permanent with protection can’t be equipped by Equipment that have the stated quality. Such Equipment become unattached from that permanent, but remain in play. (See rule 420, “State-Based Effects.”)
502.7e Any damage that would be dealt by sources that have the stated quality to a permanent that has protection is prevented.
502.7f If a creature with protection attacks, it can’t be blocked by creatures that have the stated quality.
502.7g Multiple instances of protection from the same quality on the same permanent are redundant.
502.8. Shadow
502.8a Shadow is an evasion ability.
502.8b A creature with shadow can’t be blocked by creatures without shadow, and a creature without shadow can’t be blocked by creatures with shadow. (See rule 309, “Declare Blockers Step.”)
502.8c Multiple instances of shadow on the same creature are redundant.
502.9. Trample
502.9a Trample is a static ability that modifies the rules for assigning an attacking creature’s combat damage. A creature with trample has no special abilities when blocking or dealing noncombat damage. (See rule 310, “Combat Damage Step.”)
502.9b The controller of an attacking creature with trample first assigns damage to the creature(s) blocking it. If all those blocking creatures are assigned lethal damage, any remaining damage is assigned as its controller chooses among those blocking creatures and the defending player. When checking for assigned lethal damage, take into account damage already on the creature and damage from other creatures that will be assigned at the same time (see rule 502.9e). The controller need not assign lethal damage to all those blocking creatures but in that case can’t assign any damage to the defending player.
502.9c If all the creatures blocking an attacking creature with trample are removed from combat before the combat damage step, all its damage is assigned to the defending player.
502.9d Assigning damage from a creature with trample considers only the actual toughness of a blocking creature, not any abilities or effects that might change the final amount of damage dealt.
Example: A 6/6 green creature with trample is blocked by a 2/2 creature with protection from green. The attacking creature’s controller must assign at least 2 damage to the blocker, even though that damage will be prevented by the blocker’s protection ability. The attacking creature’s controller can then choose to assign the rest of the damage to the defending player.
502.9e When there are several attacking creatures, it’s legal to assign damage from those without trample so as to maximize the damage of those with trample.
Example: A 2/2 creature with an ability that enables it to block multiple attackers blocks two attackers: a 1/1 with no special abilities a 3/3 with trample. The attacking player could assign 1 damage from the first attacker and 1 damage from the second to the blocking creature, and 2 damage to the defending player from the creature with trample.
502.9f Multiple instances of trample on the same creature are redundant.
502.10. Banding
502.10a Banding is a static ability that modifies the rules for declaring attackers and assigning combat damage.