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'This creature gets +1/+1 for each creature your opponents control.
'{T}: Add {C}{C}. Activate only if you control five or more lands.
'This land enters tapped.
{T}: Add {U}, {B}, or {R}.
'This land enters tapped. When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.) {T}: Add {R} or...
'Enchant creature
When this Aura enters, draw a card.
Enchanted creature gets +1/+0.
'Haste (This creature can attack and {T} as soon as it comes under your control.)
'Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
'When this creature enters, creatures you control get +1/+0 until end of turn. Unearth {2}{R} ({2}{R}: Return this card from your graveyard to the battlefield. It gains haste. Exile it...
'This creature enters with X +1/+1 counters on it.
Whenever one or more +1/+1 counters are put on another non-Hydra creature you control, put a +1/+1 counter on this creature.
'Flying Whenever you attack with one or more Wraiths, exile the top X cards of your library, where X is their total power. You may play those cards this turn....
'Deathtouch
Hyperphase Threshers — Whenever an artifact you control enters, this creature gains first strike until end of turn.
'Whenever a Wolf or Werewolf you control deals combat damage to a player, draw a card. At the beginning of your upkeep, if you control three or more Wolves and/or...