Basilisk Collar (2XM-233) Fallout Trample Whenever a source you

Trample Whenever a source you control deals 5 or more damage to a player

then you may put a permanent card with mana value X or less from your hand onto the battlefield

instead exile it and you gain 2 life

Exhaust — {3}{R}: Create a 4/4 red Dinosaur Dragon creature token with flying

you may search your library for an Elemental card

Basilisk Collar (2XM-233) Fallout Trample Whenever a source youEquipped creature has deathtouch and lifelink. (Any amount of damage it deals to a creature is enough to destroy it. Damage dealt by this creature also causes you to gain that much life.) Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)