What are all the types of counters in Magic the Gathering?
well, starting with the most common ones:
+1/+1 (graft and many other things)
-1/-1 (wither/persist)
+1/+0 ("Clockwork" creatures in early sets, not used
anymore)
loyalty (planeswalkers)
charge (Sunbust/artifacts/some creatures/vivid lands)
quest (ascensions/quests from zendikar block)
poison
level (leveler creatures in Rise of the Eldrazi)
fade (fading)
time (vanishing/suspend)
age (cumulative upkeep)
storage (lands from several sets)
ki (betrayers of kamigawa)
divinity (the Myojin's)
blaze (Obsidian Fireheart)
phylactery (Phylactery Lich)
feather (aven mimeomancer/Kangee, Aerie Keeper)
wish (Djinn of Wishes)
bribery (Gwafa Hazid, Profiteer)
tower (Helix Pinnacle)
doom (Armageddon Clock)
gold (Aurification)
page (Barrin's Codex)
fuse (Bomb Squad)
luck (Chance Encounter/Gemstone Caverns)
pupa (Cocoon)
mire (Cyclopean Tomb)
ice (Dark Depths)
flood (Aquitect's Will)
healing (Fylgja)
delay (Ertai's Meddling)
and there's probably a lot more that are only used on one card
like the last several, i got tired after the cards A-F, but all the
most common ones are there