Ampryn Tactician | Creature | Human Soldier | When Ampryn Tactician enters the battlefield, creatures you control get +1/+1 until end of turn. | Cynthia Sheppard
Archangel of Tithes | Creature | Angel | Flying
As long as Archangel of Tithes is untapped, creatures can't attack you or planeswalkers you control unless their controller pays {1} for each of those creatures.
As long as Archangel of Tithes is attacking, creatures can't block unless their controller pays {1} for each of those creatures. | Cynthia Sheppard
4.5 LSV
Charging Griffin | Creature | Griffin | Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Charging Griffin attacks, it gets +1/+1 until end of turn. | Erica Yang
Kytheon's Irregulars | Creature | Human Soldier | Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
{W}{W}: Tap target creature. | Mark Winters
Suppression Bonds | Enchantment | Aura | Enchant nonland permanent
Enchanted permanent can't attack or block, and its activated abilities can't be activated. | Chris Rallis
Valor in Akros | Enchantment | | Whenever a creature enters the battlefield under your control, creatures you control get +1/+1 until end of turn. | Igor Kieryluk
War Oracle | Creature | Human Cleric | Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.) | Steve Prescott
Thunderclap Wyvern | Creature | Drake | Flash (You may cast this spell any time you could cast an instant.)
Flying
Other creatures you control with flying get +1/+1. | Jason Felix